MPG Calculator

Calculate fuel efficiency from distance & gallons

How to Use

Select Calculate MPG or Trip Tracker.

Input miles driven or odometer readings.

Input gallons of fuel consumed.

See MPG, L/100km, km/L, and efficiency rating.

How do I calculate MPG?

MPG = Miles driven / Gallons used. Fill your tank, drive, refill, and divide miles by gallons added.

What is L/100km?

Liters per 100 kilometers - the metric fuel consumption measure. Lower is better. 10 L/100km ≈ 24 MPG.

What is the difference between US and Imperial MPG?

Imperial (UK) gallon is about 20% larger than US gallon. Imperial MPG is always higher for the same car.

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