Fuel Economy Converter
Enter one positive value, choose its source and target units, and convert locally using fixed unit constants.
US and UK gallons are different. Results are rounded for display.
Conversions
A QUICK WALKTHROUGH
How to use this tool
- Enter a positive finite value.
- Choose the source and target units.
- Review the converted value; no fuel prices or vehicle data are used.
Fixed unit definitions
A US gallon is 3.785411784 litres; an Imperial gallon is 4.54609 litres. Values are rounded for display.
Only the value you enter
This browser-local converter does not load current fuel prices, vehicle specifications, or external databases.
GOOD TO KNOW
Common questions
Why do US and UK mpg differ?
A US gallon and an Imperial gallon have different volumes.
Does this use vehicle or fuel data?
No. It uses only your value and fixed unit constants.