Mileage Calculator

Mileage = Distance travelled ÷ Fuel used. In metric units this gives km/L; in imperial units it gives MPG. For the most accurate result, fill the tank completely, drive normally, refill to the exact same level, then enter the distance covered and the fuel added — this brim-to-brim method eliminates partial-tank errors.

For petrol or diesel cars, 14–20 km/L is good and above 20 km/L is excellent. SUVs, pickups, and heavy city driving typically fall below this range. For EVs, 4.8–6 km/kWh is good and above 6 km/kWh is excellent. Vehicle size, tyre pressure, speed, AC use, traffic conditions, and maintenance all influence the result.

km/L (kilometres per litre) is used in Bangladesh, India, Japan, and most metric countries. MPG (miles per gallon) is used in the USA and UK. One km/L equals approximately 2.352 MPG (US) or 2.825 MPG (UK). This calculator shows cross-unit results so you can compare values across regions without manual conversion.

The result is as accurate as the distance and fuel data you enter. A brim-to-brim refill measurement is more reliable than the dashboard estimate, which may be calculated differently by the vehicle's ECU. Real-world efficiency changes with traffic, speed, terrain, tyre pressure, fuel quality, weather, and vehicle load.

EV efficiency is measured as km/kWh (or mi/kWh) — distance per unit of electricity. Higher values mean the vehicle travels farther on the same energy. Charging cost = kWh used × electricity price per kWh. Cost per km = electricity price ÷ km/kWh. These formulas work the same way as fuel-based formulas but with kWh replacing litres.

Use Fuel mode for hybrid vehicles and enter real refill data after each fill-up. The formula is the same as for any fuel vehicle: mileage = distance ÷ fuel used. This gives more trustworthy results than trying to estimate hybrid efficiency from manufacturer labels, which are based on controlled test conditions.

One mile equals 1.609 km, so a mile is a longer unit of distance than a kilometre. For the same vehicle and fuel price, cost per mile is approximately 1.609 times cost per km — this is purely a unit conversion difference, not a calculation error.

RON stands for Research Octane Number — a rating of a fuel's resistance to engine knock (pre-ignition). Regular petrol is typically RON 91, mid-grade or octane is around RON 95, and premium is RON 97 or higher. Always use the grade recommended by your vehicle manufacturer; using a lower grade than specified can reduce performance and efficiency.

Gasoline and petrol refer to the same fuel. Gasoline is the standard term in the USA and Canada; petrol is used in Bangladesh, the UK, India, Australia, and most other countries. This calculator uses both terms so users from any region can find it naturally.

Monthly cost = (Monthly distance ÷ Mileage) × Fuel price. You must enter either daily or monthly driving distance — the calculator uses daily distance × 30 if you enter daily figures. Without a distance input, monthly and yearly cost estimates are not shown, since displaying them without user data would be misleading.

Maintain correct tyre pressure, avoid hard acceleration and sudden braking, remove unnecessary cargo, service the engine and air filter on schedule, use the recommended engine oil, plan routes to avoid congestion, and drive at steady speeds on highways. For EVs, use regenerative braking, moderate highway speed, and pre-condition the cabin while still plugged in.