Fuel Economy Calculator

💡 Understanding Fuel Economy

MPG (Miles Per Gallon)

How many miles you can travel on one gallon of fuel. Higher is better.
Formula: MPG = Distance (miles) ÷ Fuel (gallons)

L/100km (Liters per 100 kilometers)

How many liters of fuel needed to travel 100 km. Lower is better.
Formula: L/100km = (Fuel (liters) ÷ Distance (km)) × 100

MPG (US) vs MPG (UK)

US gallon = 3.785 liters | UK gallon = 4.546 liters
So MPG (UK) = MPG (US) × 1.201

📊 Conversion Reference

MPG (US) L/100km MPG (UK)
1023.512.0
2011.824.0
307.836.0
405.948.0
504.760.0
603.972.1

📖 Formulas

1
MPG (US) = Miles ÷ Gallons
2
MPG (UK) = MPG (US) × 1.20095
3
L/100km = (Liters ÷ km) × 100
4
Trip Cost = (Distance ÷ MPG) × Price per gallon