Fuel Cost Per Mile Calculator
Work out what each mile or kilometre costs in fuel at your own economy and fuel price.
Every figure below is labelled in the currency you pick. Amounts are not converted — enter your own figures in that currency. To convert an amount at today’s rate, use the currency calculator.
What this page needs from you
This page asks for fuel price in $/L and fuel economy in L/100km. From those it returns cost per mile in $, together with cost per kilometre, cost per 100 km, annual cost at 15,000 km and mpg equivalent. Every figure updates as you type, and nothing you enter leaves your browser.
When to use something else
Every calculation is a model, and a model is a deliberate simplification. Where the answer will drive a decision that is expensive or hard to reverse, use this to understand the shape of the problem and then confirm the specifics with someone who can see details this page cannot.
Reading the result properly
The figure above answers exactly the question the inputs describe and no more. Changing one input at a time and watching which part of the breakdown moves usually teaches more than the headline number does, because it shows which variable your situation is actually sensitive to.
The formula
Cost per km = price per litre × L/100km ÷ 100
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the Fuel Cost Per Mile Calculator
- Fill in each field with your own figures — the defaults are only there as an example.
- The result updates as you type, so there is no button to press.
- Check the breakdown under the main result for the supporting numbers.
- Use the copy button to take the result with you, or share the link to reload the same inputs.
Fuel Cost Per Mile Calculator — frequently asked questions
Is this fuel cost per mile calculator free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
How accurate is the result?
The maths is exact for the formula shown on the page. Accuracy in the real world depends on your inputs and on assumptions the formula cannot see, so treat the output as a well-grounded estimate rather than a quote.
Can I use it on my phone?
Yes. The page is responsive, weighs a few kilobytes and works offline once loaded, so it behaves the same on a phone as on a desktop.
What people search for
This page answers each of these searches. They are the exact phrases visitors use to find the fuel cost per mile calculator.
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About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed September 10, 2026 · Calculation runs client-side · No data collected · Report an error