All Tools VerseFuel Economy Converter - MPG and L/100km
Free fuel economy converter. Switch between US mpg, UK mpg, km per liter and liters per 100 km instantly. Runs in your browser, private and offline.
- Runs in your browser
- Nothing uploaded
- Free, no sign-up
Convert fuel economy between US miles per gallon, UK miles per gallon, kilometers per liter and liters per 100 km. The result updates instantly in your browser.
How to Use Fuel Economy Converter - MPG and L/100km
- Enter your value. Type the fuel economy figure you want to convert in the Value box.
- Pick the From unit. Choose the unit your value is in, such as US miles per gallon.
- Pick the To unit. Choose the unit you want the answer in, such as liters per 100 km. Use the swap button to flip them.
- Read the result. The converted value shows instantly, with the full formula below it.
- See every unit. The table lists your value in all fuel economy units at once, and you can copy the result or a share link.
Frequently Asked Questions
How do I convert mpg to L/100km?
Divide 235.2 by the US miles per gallon figure. For example, 30 US mpg is about 7.84 liters per 100 km. The relationship is inverse, so a higher mpg means a lower L/100km.
Why are US and UK mpg different?
A US gallon is about 3.785 liters while a UK imperial gallon is about 4.546 liters. Because the UK gallon is larger, the same car shows a higher mpg figure in UK units than in US units.
Is a higher or lower number better?
For miles per gallon and kilometers per liter, higher is more efficient. For liters per 100 km, lower is more efficient, since it uses less fuel for the same distance.
How do I convert L/100km to km per liter?
Divide 100 by the liters per 100 km figure. For example, 8 L/100km is 12.5 km per liter. They are inverse measures of the same thing.
Is my data sent anywhere?
No. The conversion runs entirely in your browser, so the values you enter never leave your computer and it works offline once loaded.
Can I see all units at once?
Yes. The table converts your value into US mpg, UK mpg, km per liter and L/100km at the same time, so you can compare them directly.
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