All calculators

Every calculator on the site, grouped by category. Looking to convert a unit instead? Those live in the converter section.

Financial Calculators

180 tools
Mortgage Calculator Estimate a full monthly mortgage payment including principal, interest, prope… Loan Calculator Work out the monthly payment, total interest and payoff date for any fixed-ra… Auto Loan Calculator Price a car loan with sales tax, dealer fees, a trade-in and a down payment f… Interest Calculator See how much interest a balance earns over time with any compounding frequenc… Payment Calculator Solve for the fixed monthly payment on any amount financed, or work backwards… Retirement Calculator Project the balance you will have at retirement, restate it in today's dollar… Amortization Calculator Build a full amortization schedule showing interest, principal and remaining … Investment Calculator Project what an investment grows to with regular contributions, and split the… Currency Calculator Convert between major currencies using a rate you supply or the live rate you… Inflation Calculator See what a sum of money will be worth after years of inflation, in both direc… Finance Calculator A general time-value-of-money solver: enter present value, payment, rate and … Mortgage Payoff Calculator Find out how many years and how much interest an extra monthly payment remove… Income Tax Calculator Estimate federal income tax with progressive brackets, the standard or itemiz… Compound Interest Calculator Watch compounding work: the balance, the interest earned, and how much differ… Salary Calculator Convert any pay rate to hourly, weekly, biweekly, monthly and annual equivale… 401K Calculator Project a 401(k) balance including employer match, salary growth and compound… Interest Rate Calculator Work backwards from a payment you were quoted to the interest rate you are ac… Sales Tax Calculator Add sales tax to a price or strip it back out, for any state or local rate. House Affordability Calculator Turn your income, debts and down payment into a realistic maximum home price … Savings Calculator Plan a savings goal: how a starting balance plus steady deposits grows at a g… Rent Calculator Find the rent range your income supports, using the 30% rule and the stricter… Marriage Tax Calculator Compare tax filed separately as two singles against married filing jointly to… Estate Tax Calculator Estimate federal estate tax after debts, charitable bequests and the lifetime… Pension Calculator Calculate a defined-benefit pension from your service years, benefit multipli… Social Security Calculator See how claiming Social Security early or late changes your monthly check and… Annuity Calculator Value a stream of fixed payments as an ordinary annuity or an annuity due, in… Annuity Payout Calculator Work out the sustainable payment a lump sum supports over a fixed payout peri… Credit Card Calculator Find out how long a credit card balance takes to clear at your current paymen… Credit Cards Payoff Calculator Compare the avalanche and snowball strategies across several cards and see wh… Debt Payoff Calculator See your debt-free date and the interest an extra payment each month removes. Debt Consolidation Calculator Compare your current debts against a consolidation loan, fees included, befor… Repayment Calculator Set a repayment schedule for any balance and see total interest by term. Student Loan Calculator Plan student loan repayment on the standard 10-year plan, including interest … College Cost Calculator Project the full cost of a degree years from now and the monthly saving neede… Simple Interest Calculator Calculate flat, non-compounding interest with the classic I = P·r·t formula. CD Calculator Value a certificate of deposit or fixed deposit at maturity and compare terms… Bond Calculator Price a bond from its coupon, maturity and the market yield, and see current … Mutual Fund Calculator Project a mutual fund or SIP investment and see exactly how much the expense … Roth IRA Calculator Project a Roth IRA and compare it with a taxable account so you can see the v… IRA Calculator Project a traditional IRA balance and the after-tax value once withdrawals ar… RMD Calculator Calculate the required minimum distribution from a retirement account using t… VAT Calculator Add VAT to a net price or extract VAT from a gross price at any rate. Cash Back or Low Interest Calculator Decide between a manufacturer rebate and a promotional low APR by comparing t… Auto Lease Calculator Break a car lease into depreciation and rent charge so you can see exactly wh… Depreciation Calculator Produce a depreciation schedule using straight-line, double-declining-balance… Average Return Calculator Convert a total gain into a compound annual growth rate, the only fair way to… Margin Calculator Calculate gross margin, markup and profit per unit, and stop confusing margin… Discount Calculator Apply one or more discounts to a price and see the real saving, tax included. Business Loan Calculator Price a business loan including origination fees, and see the true APR after … Debt-to-Income Ratio Calculator Calculate front-end and back-end DTI, the two numbers every mortgage underwri… Real Estate Calculator Evaluate a property purchase: cash flow, cap rate, cash-on-cash return and eq… Take-Home-Paycheck Calculator Estimate net pay after federal tax, Social Security, Medicare, state tax and … Personal Loan Calculator Price a personal loan with origination fees folded into the effective rate. Boat Loan Calculator Price a boat, RV or other recreational vehicle loan, which typically runs lon… Lease Calculator Calculate a general lease payment from asset value, residual value, term and … Refinance Calculator Compare your current mortgage with a refinance, including closing costs and t… Budget Calculator Balance a monthly budget and compare your spending against the 50/30/20 guide… Rental Property Calculator Underwrite a rental: cash flow, cap rate, cash-on-cash return, and the 1% rul… IRR Calculator Compute IRR and NPV for a series of yearly cash flows to judge whether a proj… ROI Calculator Turn an investment gain into ROI and an annualized rate you can compare acros… APR Calculator Fold origination fees and points into the rate to get the APR lenders must di… FHA Loan Calculator Price an FHA loan including the upfront and annual mortgage insurance premium. VA Mortgage Calculator Price a VA loan with the funding fee, which changes with your down payment an… Home Equity Loan Calculator Find how much equity you can borrow and what the second-mortgage payment woul… HELOC Calculator Model a HELOC through both phases: interest-only during the draw period, then… Down Payment Calculator Work out the down payment a purchase needs and how long your saving rate take… Rent vs. Buy Calculator Compare the total cost of renting and buying over your real time horizon, inc… Payback Period Calculator Find how long an investment takes to repay itself, on both a simple and a dis… Present Value Calculator Discount a future sum or a stream of payments back to what it is worth today. Future Value Calculator Grow a sum forward at a given rate, with or without annual additions. Commission Calculator Calculate gross commission and your take after a brokerage split. Mortgage Calculator UK Price a UK mortgage in pounds on either a repayment or interest-only basis, w… Canadian Mortgage Calculator Price a Canadian mortgage with semi-annual compounding and accelerated paymen… Mortgage Amortization Calculator Print a complete mortgage amortization schedule with yearly summaries and the… Percent Off Calculator Take any percentage off a price instantly and see what you save. APY Calculator Convert a nominal rate into the annual percentage yield you actually earn onc… CAGR Calculator Turn a start value, an end value and a time span into the compound annual gro… SIP Calculator Project a systematic investment plan: what regular monthly contributions grow… Forex Compounding Calculator Model a trading account compounding at a fixed percentage per period, with op… How Long Will Money Last Calculator See how long a pot of money survives a given withdrawal rate, with returns co… Money Counter Count a cash drawer, a till or a jar of change by denomination, with running … Stock Average Calculator Work out your weighted average cost per share across several purchases, and s… Savings Goal Calculator Work backwards from a target and a deadline to the monthly amount you need to… Price Per Square Foot Calculator Compare properties or quotes on a like-for-like basis by reducing them to pri… Cash Back Calculator Work out whether a rewards card actually pays: cash back earned, the annual f… Annual Salary Calculator Convert any pay rate into an annual salary, with the weekly, biweekly and mon… Monthly Salary Calculator Work out monthly gross pay from any hourly, weekly or annual figure — the num… Weekly Pay Calculator Convert an hourly rate or annual salary into weekly gross pay, including part… Biweekly Pay Calculator Work out biweekly gross pay and see why 26 pay periods a year is not the same… 15 Year Mortgage Calculator Price a 15-year fixed mortgage and compare the higher payment against the int… Loan Payoff Calculator See how fast a loan clears at your current payment, and how much sooner — and… 72 Month Car Loan Calculator Model a six-year car loan and see the interest the longer term adds against t… Daily Compound Interest Calculator Compound interest calculated daily — the schedule savings accounts and most c… 20 Year Mortgage Calculator Estimate a full monthly mortgage payment including principal, interest, prope… 3 Year Loan Calculator Work out the monthly payment, total interest and payoff date for any fixed-ra… 10 Year Loan Calculator Work out the monthly payment, total interest and payoff date for any fixed-ra… 48 Month Auto Loan Calculator Price a car loan with sales tax, dealer fees, a trade-in and a down payment f… 72 Month Auto Loan Calculator Price a car loan with sales tax, dealer fees, a trade-in and a down payment f… 84 Month Auto Loan Calculator Price a car loan with sales tax, dealer fees, a trade-in and a down payment f… 24 Month Payment Calculator Solve for the fixed monthly payment on any amount financed, or work backwards… 36 Month Payment Calculator Solve for the fixed monthly payment on any amount financed, or work backwards… 60 Month Payment Calculator Solve for the fixed monthly payment on any amount financed, or work backwards… 3 Year Amortization Calculator Build a full amortization schedule showing interest, principal and remaining … 5 Year Amortization Calculator Build a full amortization schedule showing interest, principal and remaining … 10 Year Amortization Calculator Build a full amortization schedule showing interest, principal and remaining … 3 Year Inflation Calculator See what a sum of money will be worth after years of inflation, in both direc… 5 Year Inflation Calculator See what a sum of money will be worth after years of inflation, in both direc… 10 Year Inflation Calculator See what a sum of money will be worth after years of inflation, in both direc… Quarterly Compound Interest Calculator Interest compounded four times a year, the convention for many bonds and cert… 3 Year 401K Calculator Project a 401(k) balance including employer match, salary growth and compound… 5 Year 401K Calculator Project a 401(k) balance including employer match, salary growth and compound… 10 Year 401K Calculator Project a 401(k) balance including employer match, salary growth and compound… 24 Month Interest Rate Calculator Work backwards from a payment you were quoted to the interest rate you are ac… 36 Month Interest Rate Calculator Work backwards from a payment you were quoted to the interest rate you are ac… 3 Year Annuity Payout Calculator Work out the sustainable payment a lump sum supports over a fixed payout peri… 5 Year Annuity Payout Calculator Work out the sustainable payment a lump sum supports over a fixed payout peri… 10 Year Annuity Payout Calculator Work out the sustainable payment a lump sum supports over a fixed payout peri… 24 Month Repayment Calculator Set a repayment schedule for any balance and see total interest by term on a … 60 Month Repayment Calculator Set a repayment schedule for any balance and see total interest by term on a … 20 Year Student Loan Calculator Plan student loan repayment on the standard 10-year plan, including interest … 3 Year Roth IRA Calculator Project a Roth IRA and compare it with a taxable account so you can see the v… 5 Year Roth IRA Calculator Project a Roth IRA and compare it with a taxable account so you can see the v… 10 Year Roth IRA Calculator Project a Roth IRA and compare it with a taxable account so you can see the v… 3 Year IRA Calculator Project a traditional IRA balance and the after-tax value once withdrawals ar… 5 Year IRA Calculator Project a traditional IRA balance and the after-tax value once withdrawals ar… 10 Year IRA Calculator Project a traditional IRA balance and the after-tax value once withdrawals ar… Remove VAT Calculator Strip VAT out of a gross price to find the net figure — the calculation for r… 24 Month Cash Back or Low Interest Calculator Decide between a manufacturer rebate and a promotional low APR by comparing t… 36 Month Cash Back or Low Interest Calculator Decide between a manufacturer rebate and a promotional low APR by comparing t… 48 Month Auto Lease Calculator Break a car lease into depreciation and rent charge so you can see exactly wh… 60 Month Auto Lease Calculator Break a car lease into depreciation and rent charge so you can see exactly wh… 72 Month Auto Lease Calculator Break a car lease into depreciation and rent charge so you can see exactly wh… 84 Month Auto Lease Calculator Break a car lease into depreciation and rent charge so you can see exactly wh… 3 Year Business Loan Calculator Price a business loan including origination fees, and see the true APR after … 5 Year Business Loan Calculator Price a business loan including origination fees, and see the true APR after … 10 Year Business Loan Calculator Price a business loan including origination fees, and see the true APR after … 3 Year Real Estate Calculator Evaluate a property purchase: cash flow, cap rate, cash-on-cash return and eq… 5 Year Real Estate Calculator Evaluate a property purchase: cash flow, cap rate, cash-on-cash return and eq… 10 Year Real Estate Calculator Evaluate a property purchase: cash flow, cap rate, cash-on-cash return and eq… Weekly Take-Home Pay Calculator Estimate net pay after federal tax, Social Security, Medicare, state tax and … Monthly Take-Home Pay Calculator Estimate net pay after federal tax, Social Security, Medicare, state tax and … Semi-Monthly Take-Home Pay Calculator Estimate net pay after federal tax, Social Security, Medicare, state tax and … 24 Month Personal Loan Calculator Price a personal loan with origination fees folded into the effective rate on… 60 Month Personal Loan Calculator Price a personal loan with origination fees folded into the effective rate on… 3 Year Boat Loan Calculator Price a boat, RV or other recreational vehicle loan, which typically runs lon… 5 Year Boat Loan Calculator Price a boat, RV or other recreational vehicle loan, which typically runs lon… 7 Year Boat Loan Calculator Price a boat, RV or other recreational vehicle loan, which typically runs lon… 48 Month Lease Calculator Calculate a general lease payment from asset value, residual value, term and … 60 Month Lease Calculator Calculate a general lease payment from asset value, residual value, term and … 72 Month Lease Calculator Calculate a general lease payment from asset value, residual value, term and … 84 Month Lease Calculator Calculate a general lease payment from asset value, residual value, term and … 3 Year Rental Property Calculator Underwrite a rental: cash flow, cap rate, cash-on-cash return, and the 1% rul… 5 Year Rental Property Calculator Underwrite a rental: cash flow, cap rate, cash-on-cash return, and the 1% rul… 10 Year Rental Property Calculator Underwrite a rental: cash flow, cap rate, cash-on-cash return, and the 1% rul… 3 Year APR Calculator Fold origination fees and points into the rate to get the APR lenders must di… 5 Year APR Calculator Fold origination fees and points into the rate to get the APR lenders must di… 10 Year APR Calculator Fold origination fees and points into the rate to get the APR lenders must di… 3 Year FHA Loan Calculator Price an FHA loan including the upfront and annual mortgage insurance premium… 5 Year FHA Loan Calculator Price an FHA loan including the upfront and annual mortgage insurance premium… 10 Year FHA Loan Calculator Price an FHA loan including the upfront and annual mortgage insurance premium… 15 Year VA Mortgage Calculator Price a VA loan with the funding fee, which changes with your down payment an… 20 Year VA Mortgage Calculator Price a VA loan with the funding fee, which changes with your down payment an… 20 Year Home Equity Loan Calculator Find how much equity you can borrow and what the second-mortgage payment woul… 30 Year Home Equity Loan Calculator Find how much equity you can borrow and what the second-mortgage payment woul… 3 Year Rent vs. Buy Calculator Compare the total cost of renting and buying over your real time horizon, inc… 5 Year Rent vs. Buy Calculator Compare the total cost of renting and buying over your real time horizon, inc… 10 Year Rent vs. Buy Calculator Compare the total cost of renting and buying over your real time horizon, inc… 15 Year Mortgage Calculator UK Price a UK mortgage in pounds on either a repayment or interest-only basis, w… 20 Year Mortgage Calculator UK Price a UK mortgage in pounds on either a repayment or interest-only basis, w… 30 Year Mortgage Calculator UK Price a UK mortgage in pounds on either a repayment or interest-only basis, w… 15 Year Canadian Mortgage Calculator Price a Canadian mortgage with semi-annual compounding and accelerated paymen… 20 Year Canadian Mortgage Calculator Price a Canadian mortgage with semi-annual compounding and accelerated paymen… 30 Year Canadian Mortgage Calculator Price a Canadian mortgage with semi-annual compounding and accelerated paymen… 15 Year Mortgage Amortization Calculator Print a complete mortgage amortization schedule with yearly summaries and the… 20 Year Mortgage Amortization Calculator Print a complete mortgage amortization schedule with yearly summaries and the… 10 Percent Off Calculator Take 10% off any price and see exactly what you save. 20 Percent Off Calculator Take 20% off any price and see exactly what you save. 25 Percent Off Calculator Take 25% off any price and see exactly what you save. 40 Percent Off Calculator Take 40% off any price and see exactly what you save. 50 Percent Off Calculator Take 50% off any price and see exactly what you save.

Fitness & Health Calculators

62 tools
BMI Calculator Calculate Body Mass Index from height and weight, and see which WHO category … Calorie Calculator Work out daily calorie needs with the Mifflin-St Jeor equation, adjusted for … Body Fat Calculator Estimate body fat percentage with the US Navy circumference method and compar… BMR Calculator Calculate the calories your body burns at complete rest, using Mifflin-St Jeo… Macro Calculator Split a calorie target into grams of protein, carbohydrate and fat for the di… Ideal Weight Calculator Compare ideal body weight across the Devine, Robinson, Miller and Hamwi formu… Pregnancy Calculator Track a pregnancy week by week: gestational age today, trimester, key milesto… Pregnancy Weight Gain Calculator Check pregnancy weight gain against Institute of Medicine guidelines for your… Pregnancy Conception Calculator Work backwards from a due date or last period to the likely conception window. Due Date Calculator Estimate a due date with Naegele's rule from your last period, a conception d… Pace Calculator Convert time and distance into pace and speed, and project finish times for c… Army Body Fat Calculator Run the US Army tape test (AR 600-9) and check the result against the standar… Carbohydrate Calculator Turn a calorie target and carb percentage into grams of carbohydrate per day … Lean Body Mass Calculator Estimate lean body mass with the Boer, James and Hume formulas or directly fr… Healthy Weight Calculator Show the healthy weight range for your height using the BMI 18.5–25 band, plu… Calories Burned Calculator Estimate calories burned in a workout from MET values, body weight and durati… One Rep Max Calculator Estimate a one-rep max from any set, and get a full percentage table for prog… Target Heart Rate Calculator Map your five training zones using maximum heart rate or the more accurate Ka… Protein Calculator Set a daily protein target based on body weight and training goal, with a per… Fat Intake Calculator Convert a fat percentage target into grams per day, with the saturated fat li… TDEE Calculator Calculate total daily energy expenditure and see the cutting, maintenance and… Ovulation Calculator Estimate ovulation and the six-day fertile window from your cycle length and … Conception Calculator Find the days you are most likely to conceive, based on ovulation timing and … Period Calculator Predict your next six periods, plus ovulation and PMS windows, from your cycl… GFR Calculator Estimate glomerular filtration rate with the 2021 CKD-EPI creatinine equation… Body Type Calculator Classify body shape from bust, waist and hip measurements, and see waist-to-h… Body Surface Area Calculator Calculate body surface area with the four standard clinical formulas used for… BAC Calculator Estimate blood alcohol concentration with the Widmark formula and the time un… Anorexic BMI Calculator Show where a BMI sits relative to clinical underweight thresholds, with the s… Weight Watcher Points Calculator Estimate a points value for a food from its calories, saturated fat, sugar an… Overweight Calculator See how far a weight sits above the healthy BMI band and what reaching the to… Steps to Miles Calculator Convert a step count into miles and kilometres using a stride length estimate… Miles to Steps Calculator Convert a distance into the number of steps it takes at your own stride lengt… Steps to Calories Calculator Estimate calories burned from a step count, adjusted for body weight, stride … Sobriety Calculator Count time since a sobriety date in years, months, days and total days, with … WHR Calculator Calculate waist-to-hip ratio and see the WHO risk band it falls into — a bett… Water Weight Calculator Find what any volume of water weighs, in kilograms and pounds, with the densi… BMI Calculator for Women Calculate BMI and see the healthy weight range, with the specific caveats tha… BMI Calculator in Pounds and Inches Imperial BMI: enter weight in pounds and height in feet and inches, with the … Weight Loss Calorie Calculator Set a daily calorie target for weight loss based on your own maintenance leve… Bulking Calorie Calculator Set a calorie surplus for muscle gain, sized to add mass without unnecessary … Calorie Calculator in Pounds and Inches Work out daily calorie needs with the Mifflin-St Jeor equation, adjusted for … Calorie Calculator for Women Work out daily calorie needs with the Mifflin-St Jeor equation, adjusted for … Body Fat Calculator in Pounds and Inches Estimate body fat percentage with the US Navy circumference method and compar… Body Fat Calculator for Women Estimate body fat percentage with the US Navy circumference method and compar… BMR Calculator in Pounds and Inches Calculate the calories your body burns at complete rest, using Mifflin-St Jeo… BMR Calculator for Women Calculate the calories your body burns at complete rest, using Mifflin-St Jeo… Ideal Weight Calculator in Pounds and Inches Compare ideal body weight across the Devine, Robinson, Miller and Hamwi formu… Ideal Weight Calculator for Women Compare ideal body weight across the Devine, Robinson, Miller and Hamwi formu… Army Body Fat Calculator for Women Run the US Army tape test (AR 600-9) and check the result against the standar… Lean Body Mass Calculator for Women Estimate lean body mass with the Boer, James and Hume formulas or directly fr… Healthy Weight Calculator in Pounds and Inches Show the healthy weight range for your height using the BMI 18.5–25 band, plu… TDEE Calculator in Pounds and Inches Calculate total daily energy expenditure and see the cutting, maintenance and… TDEE Calculator for Women Calculate total daily energy expenditure and see the cutting, maintenance and… BAC Calculator for Women Estimate blood alcohol concentration with the Widmark formula and the time un… Anorexic BMI Calculator in Pounds and Inches Show where a BMI sits relative to clinical underweight thresholds, with the s… Overweight Calculator in Pounds and Inches See how far a weight sits above the healthy BMI band and what reaching the to… 5,000 Steps to Miles Calculator Convert 5000 steps into miles and kilometres using your own stride length. 7,500 Steps to Miles Calculator Convert 7500 steps into miles and kilometres using your own stride length. 15,000 Steps to Miles Calculator Convert 15000 steps into miles and kilometres using your own stride length. 20,000 Steps to Miles Calculator Convert 20000 steps into miles and kilometres using your own stride length. WHR Calculator for Women Calculate waist-to-hip ratio and see the WHO risk band it falls into — a bett…

Math Calculators

50 tools
Scientific Calculator A full scientific calculator with trigonometry, logarithms, powers, roots, me… Fraction Calculator Add, subtract, multiply and divide fractions, with the answer simplified and … Percentage Calculator Every common percentage question in one place: percent of a number, percent c… Triangle Calculator Solve a triangle from three sides: area, perimeter, all three angles, height … Volume Calculator Calculate the volume of cubes, boxes, cylinders, spheres, cones, pyramids and… Standard Deviation Calculator Compute standard deviation, variance, mean, sum of squares and the full five-… Random Number Generator Generate one or many random numbers in any range, with or without duplicates. Number Sequence Calculator Generate arithmetic, geometric and Fibonacci sequences with the nth term and … Percent Error Calculator Compare an observed value with a true value to get percent error, absolute er… Exponent Calculator Raise any base to any power, including negative and fractional exponents. Binary Calculator Add, subtract, multiply, divide and run bitwise operations on binary numbers,… Hex Calculator Do arithmetic in hexadecimal and convert between hex, decimal, octal and bina… Half-Life Calculator Compute remaining quantity, decay constant and mean lifetime for any exponent… Quadratic Formula Calculator Solve ax² + bx + c = 0 with real or complex roots, plus the discriminant, ver… Slope Calculator Find slope, intercept, distance and angle between two points, and get the lin… Log Calculator Take a logarithm in any base, plus ln, log₁₀, log₂ and the antilogarithm. Area Calculator Calculate the area of eight common shapes, with the formula shown alongside e… Sample Size Calculator Find the sample size a survey needs for a chosen confidence level and margin … Probability Calculator Combine probabilities: intersection, union, complement, conditional probabili… Statistics Calculator Full descriptive statistics for a data set: mean, median, mode, range, quarti… Mean, Median, Mode, Range Calculator The four measures every statistics class starts with, computed together with … Permutation and Combination Calculator Calculate permutations, combinations, factorials and repetition variants for … Z-score Calculator Convert a raw score to a z-score and a percentile, and back again. Confidence Interval Calculator Build a confidence interval around a sample mean, with the standard error and… Ratio Calculator Solve proportions, simplify ratios, scale them up or down and convert to perc… Distance Calculator Distance and midpoint between two points using the Pythagorean distance formu… Circle Calculator Enter any one circle property and get radius, diameter, circumference and are… Surface Area Calculator Total and lateral surface area for six common solids. Pythagorean Theorem Calculator Solve for any missing side of a right triangle with a² + b² = c². Right Triangle Calculator Solve a right triangle: hypotenuse, both acute angles, area, perimeter and al… Root Calculator Square roots, cube roots and any nth root, including roots of decimals. Least Common Multiple Calculator Find the LCM of two or more numbers, with the prime factorization that produc… Greatest Common Factor Calculator Find the GCF of any set of numbers using the Euclidean algorithm, with all co… Factor Calculator List every factor and factor pair of a number, and tell you whether it is pri… Rounding Calculator Round to decimal places, significant figures or the nearest ten, hundred or t… Matrix Calculator Add, subtract and multiply matrices, or find a determinant, inverse or transp… Scientific Notation Calculator Convert between decimal, scientific, engineering and E notation, with signifi… Big Number Calculator Arithmetic on numbers far beyond normal precision, using exact big-integer ma… Prime Factorization Calculator Break a number into prime factors, shown in expanded and exponent form with a… Common Factor Calculator List every factor two or more numbers share, and highlight the greatest one. Basic Calculator A clean four-function calculator with percent, sign change and memory — no cl… Long Division Calculator Divide with the full long-division worked out step by step, including the rem… Average Calculator Mean, median, mode, sum and count for any list of numbers you paste in. P-value Calculator Convert a z, t or chi-square statistic into a p-value and check it against yo… Decimal to Fraction Calculator Convert any decimal into an exact fraction in lowest terms, including repeati… Percentage Change Calculator Calculate percentage increase or decrease between two values, with the revers… Percentage Increase Calculator Work out the percentage increase between two numbers, and see what the same r… Percentage Decrease Calculator Calculate the percentage drop between two values, and the rise it would take … What Percent Is X of Y Calculator Find what percentage one number is of another — the calculation behind test s… Percent of a Number Calculator Find any percentage of any number instantly — 15% of a bill, 30% off a price,…

Other Calculators

66 tools
Age Calculator Calculate exact age in years, months and days, plus total weeks, days, hours … Date Calculator Add or subtract days, weeks, months and years from a date, or measure the gap… Time Calculator Add and subtract hours, minutes and seconds, with the answer in decimal hours… Hours Calculator Count hours between two clock times with breaks deducted, in decimal and hour… GPA Calculator Calculate semester and cumulative GPA on a 4.0, 4.3 or 5.0 scale from letter … Grade Calculator Work out your current weighted grade and the score you need on what is left t… Height Calculator Predict adult height with the mid-parental method, and convert freely between… Concrete Calculator Work out cubic yards and metres of concrete for slabs, footings, columns and … IP Subnet Calculator Turn an IP and CIDR prefix into network address, broadcast, mask, wildcard, h… Bra Size Calculator Convert underbust and bust measurements into a band and cup size, with US, UK… Password Generator Generate strong random passwords in your browser, with an entropy score. Noth… Dice Roller Roll any number of dice with any number of sides, with modifiers and a runnin… Conversion Calculator Convert length, weight, volume, temperature, area, speed, data, energy, press… Fuel Cost Calculator Price the fuel for a trip, split it between passengers, and see the cost per … Voltage Drop Calculator Calculate voltage drop and percentage drop for copper or aluminium conductors… BTU Calculator Size an air conditioner or heater in BTU for a room, adjusted for climate, in… Square Footage Calculator Measure floor area in square feet, yards and metres, with material cost and w… Time Card Calculator Add up a weekly timesheet with breaks, overtime and gross pay from clock-in a… Time Zone Calculator Convert a time between UTC offsets and see the day shift when it crosses midn… Love Calculator A light-hearted name compatibility score. Entertainment only — the algorithm … GDP Calculator Calculate GDP with the expenditure approach and derive per-capita and compone… Gas Mileage Calculator Convert distance and fuel used into MPG, L/100 km, km/L and cost per mile. Horsepower Calculator Convert torque and RPM into horsepower, kilowatts and metric PS. Engine Horsepower Calculator Estimate engine output from quarter-mile trap speed, elapsed time or a dyno t… Stair Calculator Design a code-compliant staircase: number of risers, exact riser height, trea… Resistor Calculator Combine resistors in series or parallel and solve voltage dividers, with powe… Ohms Law Calculator Enter any two of voltage, current, resistance or power and get the other two. Electricity Calculator Turn an appliance's wattage and usage into kWh, monthly cost, yearly cost and… Shoe Size Conversion Convert shoe sizes between US, UK, EU, Japanese cm and foot length in inches. Tip Calculator Split a bill and tip between any number of people, with 15/18/20% shown side … Mileage Calculator Calculate mileage reimbursement at the IRS or your own rate, and split busine… Density Calculator Density from mass and volume, converted to every common unit. Mass Calculator Find mass from density and volume, in grams, kilograms, pounds and newtons of… Weight Calculator Convert mass to weight on Earth and other worlds, and between kilograms, poun… Speed Calculator Solve for speed, distance or time, with every unit converted alongside. Molarity Calculator Calculate molarity, moles and the mass needed for any target concentration. Molecular Weight Calculator Parse a chemical formula and return molar mass with the contribution of each … Golf Handicap Calculator Calculate a World Handicap System index from your score differentials, plus y… Sleep Calculator Find bedtimes and wake times that land between 90-minute sleep cycles, so you… Tire Size Calculator Compare two tire sizes for overall diameter, circumference, sidewall height, … Roofing Calculator Turn footprint and pitch into roof area, roofing squares, bundles of shingles… Tile Calculator Count the tiles a floor or wall needs, including grout gaps, waste allowance … Mulch Calculator Calculate cubic yards of mulch, the number of bags, and what it costs to cove… Gravel Calculator Calculate cubic yards and tons of gravel or crushed stone for a driveway, pat… Wind Chill Calculator Calculate the wind chill 'feels like' temperature and the frostbite exposure … Heat Index Calculator Calculate the heat index from temperature and humidity, with the NOAA risk ca… Dew Point Calculator Calculate dew point with the Magnus formula, plus the comfort level that dew … Bandwidth Calculator Convert file size and connection speed into transfer time, and Mbps into MB/s. Base64 Encode / Decode Encode text to Base64 or decode it back, entirely in your browser with full U… URL Encode / Decode Percent-encode and decode URLs and query strings, with both component and ful… Time Duration Calculator Measure the exact duration between two dates and times in years, days, hours,… Day Counter Count the days, weeks, weekdays or weekends between two dates. Day of the Week Calculator Find the weekday for any date, plus week number, day of year and whether it i… Age Difference Calculator Work out the exact gap between two birth dates in years, months and days, plu… Chronological Age Calculator Calculate chronological age to the exact year, month and day — the format psy… Days From Today Calculator Find the exact date a given number of days from today, forwards or backwards,… Days Until Calculator Count down to any date: days remaining, plus weeks, business days and the sha… Days Between Dates Calculator Count the exact number of days between two dates, with business days, weekend… Generation Calculator Find which generation a birth year falls into, with the date ranges each labe… Birthday Calculator Everything a birth date tells you: exact age, the weekday you were born on, d… Final Grade Calculator Work out the score you need on a final exam to finish with the grade you want… University Grade Calculator Average weighted module marks into a degree classification, in UK honours ban… 20 Percent Tip Calculator Calculate a 20% tip and split the bill, with 15% and 18% shown for comparison. 15 Percent Tip Calculator Work out a 15% tip on any bill and split it between any number of people. 22 Percent Tip Calculator Work out a 22% tip on any bill and split it between any number of people. 25 Percent Tip Calculator Work out a 25% tip on any bill and split it between any number of people.

Cooking & Baking

4 tools
Cooking Converter Convert any recipe measurement between cups, spoons, grams, ounces and millil… Air Fryer Converter Convert any conventional oven recipe to air fryer temperature and time, with … Baking Conversions Calculator Convert baking ingredients to grams and scale a whole recipe up or down in on… Oven Temperature Converter Convert oven temperatures between Celsius, Fahrenheit and British gas marks, …

Pay & Salary

5 tools
Hourly to Salary Calculator Convert an hourly rate into weekly, biweekly, monthly and annual pay, with ov… Salary to Hourly Calculator Convert an annual salary into the hourly rate it really represents — includin… Overtime Calculator Calculate a week's gross pay with overtime and double-time at any multiplier,… Time and a Half Calculator Work out time-and-a-half pay for any hourly rate, with the premium shown sepa… Pay Raise Calculator See what a raise is worth per month and per hour — and whether it is actually…

Home & Garden

8 tools
CBM Calculator Calculate cubic metres for a shipment, plus volumetric weight and the chargea… Cubic Feet Calculator Calculate cubic feet from measurements in feet, inches, metres or centimetres… Cubic Yards Calculator Turn an area and a depth into cubic yards, the unit concrete, soil, mulch and… Flooring Calculator Work out how many boxes of flooring a room needs, including waste, plus total… Asphalt Calculator Calculate tons of hot-mix asphalt for a driveway or lot from area and compact… LED Savings Calculator Compare running costs between old bulbs and LEDs across a whole house, with t… Miles Per kWh Calculator Measure real electric-vehicle efficiency in miles per kWh and convert it into… MPGe Calculator Convert electric-vehicle consumption into MPGe using the EPA's 33.705 kWh-per…

Calculators for Your Site

5 tools
Mortgage Calculator for Your Site Copy one line of HTML and put a free, responsive, tracking-free calculator on… Math Calculator for Your Site Copy one line of HTML and put a free, responsive, tracking-free calculator on… Scientific Calculator for Your Site Copy one line of HTML and put a free, responsive, tracking-free calculator on… Love Calculator for Your Site Copy one line of HTML and put a free, responsive, tracking-free calculator on… Concrete Calculator for Your Site Copy one line of HTML and put a free, responsive, tracking-free calculator on…

Unit converters

1,025 converters →

One page per conversion, each with the exact factor and a table of common values.