Gas Mileage Calculator
Calculate your actual MPG (miles per gallon) and L/100km from trip distance and fuel used. Compare across fill-ups to track real-world efficiency.
Inputs
About Gas Mileage Calculator
MPG vs L/100km
Inverse relationships: higher MPG = lower L/100km. 30 MPG ≈ 7.84 L/100km. 50 MPG ≈ 4.70 L/100km. European measurement is more intuitive for comparing efficiency at the same fuel quantity.
For accurate tracking
Fill up to the same level each time (auto-shutoff click). Record odometer at every fill-up. Calculate MPG from each tank. Lifetime average is more reliable than single-tank numbers (varies with driving style and conditions).
EV equivalent
MPGe (miles per gallon equivalent) for EVs: 33.7 kWh = 1 gallon of gas energy. An EV using 30 kWh/100 mi = ~112 MPGe. Real-world cost comparison usually heavily favors EVs (electricity per kWh is much cheaper than gas energy).