Gas Mileage Calculator

How to calculate Gas Mileage calculator?

Fuel efficiency is the distance driven divided by the amount of fuel consumed. Report results as km/L or miles/gal depending on your units.

Key formula: fuel_efficiency = distance_traveled / fuel_used

Using the Gas Mileage calculator calculator: an example

Example values: start 12,345 km, end 12,675 km, fuel added 28 L, price $1.40/L.

Step-by-step calculation:

1. Calculate distance: 12,675 km − 12,345 km = 330 km.
2. Determine fuel used: 28 L (amount added during the trip).
3. Compute efficiency: 330 km ÷ 28 L ≈ 11.79 km/L.
4. Optional cost: 28 L × $1.40/L = $39.20 total fuel cost.

Frequently Asked Questions

Should I use odometer readings or GPS distance?

Odometer readings are sufficient and simple; GPS can be more precise for routes with detours. Use the same units consistently.

Do I include partial refuels?

Yes. Use the actual fuel added during the trip period you measured; partial refuels are valid as long as distance and fuel correspond.

How often should I measure for accuracy?

For reliable averages measure over several full tanks or longer trips to reduce the impact of single-trip variations.