Calculate vehicle fuel efficiency (kmpl / mpg), trip fuel cost, fuel needed for a distance, and compare two vehicles. Supports all units and currencies.
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Fuel Efficiency Calculator
Enter the distance traveled and fuel consumed to calculate your vehicle's fuel efficiency (mileage) in all units.
Per liter / per gallon (for cost analysis)
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Tankful-to-Tankful (Odometer) Method
The most accurate way to measure real-world mileage. Fill up the tank, note the odometer, drive, fill up again — enter those numbers here.
Reading when you last filled up
Reading when you filled up again
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Trip Fuel Cost Calculator
Know your vehicle's mileage? Enter the trip distance, fuel price, and mileage to find out exactly how much fuel and money the trip will cost.
Your vehicle's efficiency figure
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Range Calculator
How far can you go? Enter your fuel remaining and vehicle mileage to find out the maximum range.
Keep 10% reserve to avoid running empty
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Compare Two Vehicles
Compare fuel efficiency and running costs of two vehicles side by side.
Vehicle A
Vehicle B
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Tips to Improve Mileage
Why Monitor Your Mileage?
A sudden drop in mileage is often the first sign of a mechanical problem — poor alignment, low tyre pressure, clogged air filter, worn clutch, or a faulty O2 sensor. Monitoring mileage regularly lets you catch issues early before they become expensive repairs.
Common Causes of Poor Mileage
Low Tyre Pressure: Under-inflation increases rolling resistance — each 1 PSI drop reduces mileage ~0.3% Poor Wheel Alignment: Wheels fighting each other wastes fuel — check alignment annually Clogged Air Filter: Reduces airflow, forcing a richer fuel mixture — check every 15,000 km Worn Clutch: Slipping clutch means the engine revs more for less movement Faulty O2 Sensor: Incorrect fuel-air ratio — engine burns rich to compensate Aggressive Driving: Hard braking and acceleration can reduce mileage 15–40% Air Conditioning: AC can reduce mileage by 10–25%, especially at low speeds Excess Weight: Every 100 kg extra reduces mileage ~1–2%
How to Improve Mileage
1. Maintain correct tyre pressure — check monthly 2. Drive at steady speeds — use cruise control on highways 3. Avoid idling — turn off engine if stopped over 60 seconds 4. Use recommended engine oil — lower viscosity = less friction 5. Service regularly — clean air filter, spark plugs, fuel injectors 6. Coast to stops — lift off early, let momentum carry you 7. Reduce AC use — at low speeds, windows open is more efficient 8. Remove roof racks when not in use — aerodynamic drag costs fuel 9. Drive at optimal speed — typically 60–80 km/h (37–50 mph) for most cars 10. Check alignment and balance — annually or after hitting potholes
Tankful-to-Tankful Method (Most Accurate)
1. Fill tank completely — note odometer reading A
2. Drive normally until fuel is low
3. Fill tank completely again — note odometer reading B and litres added
4. Mileage = (B - A) ÷ Litres added
This eliminates errors from partial fills and gives true real-world mileage.