For UK drivers. Distances in miles, fuel in litres and imperial gallons.
Guides
Plain-English explanations to go with the calculators.
How to work out the fuel cost of a journeyThree numbers are all you need: the distance, your car's economy and the price at the pump.HMRC mileage allowance explainedWhat your employer can pay tax-free for business journeys in your own car, and what happens if they pay less.Electric car charging costsA simple way to turn your electricity price into a cost per mile.
These calculators give estimates. Fuel prices, energy tariffs and real-world economy vary. This is general information, not tax or financial advice. Mileage rates checked against GOV.UK on 16th September 2026.