Gas Mileage Log Calculator
Track your fuel efficiency per fillup.
Enter miles or kilometers driven and fuel added to calculate MPG or L/100km.
Fuel Efficiency
Gas Mileage measures how far your vehicle travels per unit of fuel.
Imperial (US) formula:
MPG = Miles Driven / Gallons Filled
Metric formulas:
km/L = Kilometers Driven / Liters Filled
L/100km = (Liters Filled / Kilometers Driven) × 100
How to measure accurately:
- Fill your tank completely
- Reset your trip odometer
- Drive normally until you need fuel again
- Fill up completely and note the gallons/liters added
- Record the trip odometer reading
Typical fuel efficiency:
- Compact car: 30–40 MPG (7–8 L/100km)
- Sedan: 25–35 MPG (8–10 L/100km)
- SUV: 18–28 MPG (10–15 L/100km)
- Truck: 15–22 MPG (12–18 L/100km)
- Hybrid: 40–60 MPG (4–6 L/100km)