Mileage Calculator
Enter how far you drove and how much fuel it took to see your real-world fuel economy in every common format: miles per gallon (US), liters per 100 km, and kilometers per liter. Add the fuel price to get total trip cost and the cost per kilometer or mile.
TheCalculators — Mileage Calculator
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Fuel Economy
7 L/100 km
33.6 mpg (US) · 14.29 km/L
Trip summary
- Distance
- 400 km (248.5 mi)
- Fuel Used
- 28 L (7.4 gal)
- Consumption
- 7 L/100 km
- Economy (US)
- 33.6 mpg
- Economy (UK)
- 40.4 mpg
- Metric Economy
- 14.29 km/L
- Total Fuel Cost
- $46.20
- Cost per km
- $0.115
- Cost per mile
- $0.186
Efficiency equivalents
US gallons are used (1 gal = 3.785 L). Real-world mileage varies with traffic, speed, AC use and tire pressure — measure over several tanks for accuracy.
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Formula
L/100 km = (fuel_L ÷ distance_km) × 100 · mpg = (distance_km ÷ 1.609344) ÷ (fuel_L ÷ 3.785412)
Pro tips
- • Reset the trip odometer when you fill up for the most accurate fuel-used figure.
- • Lower L/100 km = better; higher mpg = better — they are reciprocals.
FAQ
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