Unit Converters
Fuel Consumption Converter
Convert between fuel efficiency units like MPG and Litres per 100km.
Runs in your browser Your input never leaves your device.
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About this tool
Convert fuel economy between liters per 100 kilometers, miles per US gallon, miles per UK (imperial) gallon and kilometers per liter. L/100km measures fuel used per distance, so lower is better, while MPG and km/L measure distance per fuel, so higher is better. That makes the conversion inverse rather than a simple multiplication. The tool converts through L/100km using 235.214583 for US MPG and 282.480936 for UK MPG. The two MPG options differ by about 20% because the UK gallon is larger than the US gallon. Results show up to 8 decimals.
How to use it
- Type the value to convert.
- Choose the From and To units.
- Read the result, which updates as you type.
- Use Swap to reverse the units or Copy to copy the result.
Example
Input
30 MPG (US) to L/100km
Result
7.8404861 L/100km
Common problems
- UK and US MPG numbers differ
- Always pick the right gallon. The same car shows a higher MPG in UK terms: 30 US MPG is about 36 UK MPG.
- Zero shows a dash
- Zero MPG or km/L would mean infinite consumption, so the result is not shown. Enter a value above zero.