Fuel Cost Calculator
How much will that journey — or a year of commuting — cost in fuel? Switch between MPG and metric and get the answer instantly.
Free, instant, and currency-agnostic — choose your currency inside the tool.
Built for any car, anywhere
Whether your dashboard shows miles per gallon or litres per hundred kilometres, this tool speaks both. Flip the units, enter the price you actually pay at the pump, and you get the cost of a single trip plus a clear cost per 100 miles or kilometres for quick comparisons.
From a single trip to the yearly bill
Multiply a typical week by your real distance and the fuel cost stops being abstract. Feed that annual figure into the running cost calculator to see how fuel stacks up against insurance, maintenance and depreciation in your total cost of ownership.
Frequently asked questions
How do I calculate the fuel cost of a trip?
Divide the distance by your fuel economy to get the fuel used, then multiply by the price per gallon or litre. This calculator handles both US (MPG) and metric (L/100km) units for you.
What is L/100km versus MPG?
MPG measures distance per unit of fuel — higher is better. L/100km measures fuel per fixed distance — lower is better. The calculator switches between them, so use whichever your car displays.
Why does real economy differ from the figure on the brochure?
Official figures come from controlled tests. Real driving — cold starts, traffic, speed, loads and weather — usually pushes consumption higher, so base your budget on your own observed economy.
How can I cut my fuel bill?
Keep tyres properly inflated, ease off hard acceleration, remove roof boxes when unused, and combine errands into one trip. Small habits add up over a year.