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Fuel economy

MPG to L/100 km Calculator

Convert US MPG to the metric fuel-consumption format used in much of the world.

US versus Imperial MPG

This page uses US gallons. Imperial MPG is different because the Imperial gallon is larger; use the full fuel efficiency converter if your source uses UK-style MPG.

Example

35 MPG US converts to 235.214583 / 35 = about 6.72 L/100 km.

Common mistakes

Remember that lower L/100 km is better, while higher MPG is better. The direction of improvement reverses between the two units.

Limitations

This is a unit conversion only. Real fuel use depends on driving conditions, vehicle load, speed, tires, weather and measurement method.

Last reviewed: 2026-05-17

Before relying on this result

Use this calculator together with the formula, assumptions, limitations and examples on the page. If the topic involves health, tax, lending, investment, legal, safety or current-rate decisions, treat the number as an estimate and check the relevant primary source or professional guidance.

Calculator metadata last reviewed: 2026-05-14.