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Fuel Economy Converter

Convert MPG to L/100 km and back, plus km/L and UK gallons.

  • Free
  • No sign-up
  • Nothing is sent or stored
1 mpg (US) =
235.2145833 L/100 km

L/100 km = 235.2145833 ÷ mpg (US)

1 miles per gallon (us) in every unit

Litres per 100 km235.2145833 L/100 km
Kilometres per litre0.4251437074 km/L
Miles per gallon (UK)1.200949926 mpg (UK)
Miles per litre0.2641720524 mi/L
Litres per 100 miles378.5411784 L/100 mi

Miles per gallon (US) to litres per 100 km table

mpg (US)L/100 km
1235.2145833
2117.6072917
547.04291667
1023.52145833
2011.76072917
259.408583333
504.704291667
1002.352145833
2500.9408583333
1,0000.2352145833

The calculation happens instantly in your browser. The numbers you enter are not sent to our servers or saved.

How to use the Fuel Economy Converter

  1. Type the fuel economy figure you want to convert.
  2. Choose the unit you have and the unit you want.
  3. Read the result and the reference table of common values.

What does this tool do?

Fuel economy comes in two flavours. MPG and km/L measure distance per fuel — higher is better. L/100 km measures fuel per distance — lower is better. Because one is the reciprocal of the other, there's no single multiplier: the converter divides correctly.

UK and US gallons differ (4.546 vs 3.785 litres), so 30 mpg in the UK is only about 25 mpg in the US.

Why use it?

  • Handles the reciprocal L/100 km properly.
  • US and UK gallons.
  • Reference table.

The formula

L/100 km = 235.215 ÷ mpg (US)
L/100 km = 282.481 ÷ mpg (UK)

Privacy

The calculation happens instantly in your browser. The numbers you enter are not sent to our servers or saved. There's no account to create and nothing to install.

Last reviewed by the M2Toolkit team.

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