Unit converters
Convert any unit, exactly
1,658 converters, one page per conversion, because that is how people search. Every page shows the exact factor, a table of the values looked up most often, and a definition of both units.
Length & Distance
Millimetres to miles, and every step in between.
215 converters
Area
Square metres, square feet, acres and hectares.
184 converters
Volume & Capacity
Litres, gallons, cubic feet and kitchen measures.
463 converters
Weight & Mass
Grams, kilos, pounds, stones and tonnes.
75 converters
Temperature
Celsius, Fahrenheit, Kelvin and Rankine.
12 converters
Cooking & Recipes
Cups to grams, by ingredient, not by guesswork.
74 converters
Pressure
Pascals, bar, psi, atmospheres and mmHg.
144 converters
Energy, Power & Torque
Watts, amps, torque and frequency.
36 converters
Energy & Power
Joules, calories, kilowatt-hours, BTU and horsepower.
165 converters
Material & Density
Cubic yards to tons, gallons to pounds.
5 converters
Speed
m/s, km/h, mph, knots and Mach.
46 converters
Data & Storage
Bytes, kilobytes and the KB versus KiB problem.
95 converters
Time & Angles
Seconds to years, degrees to radians.
144 converters
Most popular converters
Ranked by how often each conversion is searched for.
- Celsius to Fahrenheit Convert celsius to fahrenheit instantly. Exact formula, worked exam…
- Kilograms to Pounds Convert kilograms to pounds instantly. 1 kg = 2.2046226218 lb. Incl…
- Inches to Centimeters Convert inches to centimeters instantly. 1 in = 2.54 cm. Includes t…
- Pounds to Kilograms Convert pounds to kilograms instantly. 1 lb = 0.45359237 kg. Includ…
- Meters to Feet Convert meters to feet instantly. 1 m = 3.280839895 ft. Includes th…
- Fahrenheit to Celsius Convert fahrenheit to celsius instantly. Exact formula, worked exam…
- Centimeters to Inches Convert centimeters to inches instantly. 1 cm = 0.3937007874 in. In…
- Miles to Kilometers Convert miles to kilometers instantly. 1 mi = 1.609344 km. Includes…
- Kilometers to Miles Convert kilometers to miles instantly. 1 km = 0.6213711922 mi. Incl…
- Feet to Meters Convert feet to meters instantly. 1 ft = 0.3048 m. Includes the exa…
Most used converters
The conversions people reach for most often.
Butter Converter
Convert butter between sticks, cups, tablespoons, grams, ounces and pounds — the conversi…
Cups to Grams Converter
Convert cups to grams for any ingredient, using real densities rather than a single avera…
Grams to Cups Converter
Convert grams to cups for any ingredient, using real densities rather than a single avera…
Cups to mL Converter
Convert cups to milliliters for any ingredient, using real densities rather than a single…
Grams to mL Converter
Convert grams to milliliters for any ingredient, using real densities rather than a singl…
mL to Grams Converter
Convert milliliters to grams for any ingredient, using real densities rather than a singl…
Ounces to Cups Converter
Convert ounces to cups for any ingredient, using real densities rather than a single aver…
Cups to Pounds Converter
Convert cups to pounds for any ingredient, using real densities rather than a single aver…
Pounds to Cups Converter
Convert pounds to cups for any ingredient, using real densities rather than a single aver…
Grams to Tablespoons Converter
Convert grams to tablespoons for any ingredient, using real densities rather than a singl…
Tablespoons to Grams Converter
Convert tablespoons to grams for any ingredient, using real densities rather than a singl…
Grams to Teaspoons Converter
Convert grams to teaspoons for any ingredient, using real densities rather than a single …
Why one page per conversion?
A single converter with two dropdowns is quicker to build and worse to use. It cannot answer the question you typed, it cannot show you the factor for the pair you care about, and it cannot carry a table of the values you were probably about to look up next. Each page here does all three.
Conversions between units of the same quantity are exact by international definition — an inch has been exactly 25.4 mm since 1959 — so the only rounding you will ever see is in the display. Conversions that cross between volume and weight are different: they depend on what the material is, which is why those tools ask.
Looking for something that models a situation rather than converting a unit? That belongs in the calculator section.