Running costs
Fuel cost, gas mileage, road trip cost, mileage reimbursement and depreciation, from your own car's figures.
Fuel Cost Calculator
What a drive costs in fuel from the distance, your car’s economy in mpg, km/L or L/100 km, and the price per gallon or litre, with the cost per mile or km.
Gas Mileage Calculator
Your car’s real fuel economy from a fill-up or several, in mpg, km/L and L/100 km at once, with the cost per mile or km if you add the fuel price.
Road Trip Cost Calculator
The cost of a road trip, fuel plus whatever else you list, one way or return, split between travellers to the cent, with the driving time.
Mileage Reimbursement Calculator
What your mileage claim comes to at the rate you are paid, and how it compares with what the driving actually costs you in fuel and running costs.
Car Depreciation Calculator
What a car will be worth after a number of years at a depreciation rate you choose or derive from a valuation, and what that costs per year and per mile.
What a car costs to run is mostly two things: fuel, and the value it loses. Fuel is distance divided by economy, times the price, and the only traps are the units. An mpg figure means different things with US and imperial gallons, twenty percent apart, and litres per 100 km runs the other way, fewer being better; these pages convert between all of them exactly, so the same car gives the same answer whichever you enter. Depreciation is usually larger than fuel and far less visible: a car losing 18% a year costs more per mile in lost value than in petrol at typical prices. The pages here work both out from your own figures. No fuel price, mileage rate or depreciation rate is stored, because each changes with the market and the year; enter the one on your receipt, your employer's policy or your own car's valuation.