How is annual fuel cost calculated?

For MPG, divide annual miles by MPG to get gallons, then multiply by price per gallon. For L/100km, multiply distance by consumption divided by 100, then by price per litre.

Can I compare a thirsty car against an efficient one?

Yes — enter each vehicle's economy in the same unit and the tool shows which is cheaper to run and by how much per year.

Is anything uploaded?

No — all calculations run locally in your browser and nothing is sent anywhere.

Fuel Economy Comparison

Compare two vehicles by annual fuel cost — MPG or L/100km.

Fuel economy comparison

See which of two vehicles is cheaper to run over a year. Pick MPG or L/100km, enter your annual distance and fuel price, then type each vehicle’s economy. The tool shows both annual costs and the yearly saving of the more efficient car.

All maths happens in your browser — your data never leaves your device.