Fuel Economy Converter
Convert L/100km, km/L, US mpg and UK mpg.
How to use the Fuel Economy tool
- Enter your fuel economy in the fields above.
- Adjust any slider or type an exact number — the answer updates as you go.
- Copy the result and close the tab. Nothing you entered was sent anywhere.
About the Fuel Economy tool
Lower L/100km is better while higher mpg is better — the scales run in opposite directions, which makes mental conversion unreliable.
US and UK gallons differ, so US mpg and UK mpg values are not interchangeable. Choose the correct gallon in the unit list.
Everything runs locally in your browser: no data is uploaded, no account is needed, and it works offline once the page has loaded.
Embed this tool
Customize and copy an iframe. Linking back helps both sites.