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⛽ MPG ↔ L/100km Converter

Convert vehicle fuel economy between L/100 km, US MPG and Imperial MPG without confusing the two different gallon definitions.

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How to use the MPG ↔ L/100km Converter

  1. Enter a fuel-economy value in any supported field.
  2. Read the equivalent US MPG, Imperial MPG or L/100 km values.
  3. Use the correct MPG standard for the source specification.

About this tool

L/100 km measures fuel consumed over a fixed distance, so lower numbers are better. MPG measures distance per unit of fuel, so higher numbers are better. US and Imperial gallons are different sizes.

WispData puts the interactive tool first and performs the calculation or transformation in your browser whenever possible. No account is required.

Common uses

  • Canadian and U.S. vehicle comparisons
  • Imported vehicle specifications
  • Road-trip estimates
  • Fuel-economy research

Frequently Asked Questions

Why are US and Imperial MPG different?

An Imperial gallon is larger than a U.S. gallon, so the same vehicle has a higher numerical Imperial MPG.

Is lower L/100 km better?

Yes. It means the vehicle uses fewer litres to travel 100 kilometres.

Why is MPG conversion not a simple multiplier from L/100 km?

One measure is fuel-per-distance and the other is distance-per-fuel, so the relationship is reciprocal.

Does WispData store what I enter?

No. This tool is designed to process the values you enter locally in your browser unless a page explicitly says otherwise.

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