Fuel Cost Calculator
Estimate the fuel cost of a trip from distance, your car's fuel economy and the fuel price.
About the Fuel Cost Calculator
Enter the distance, your car's fuel economy in whatever unit it shows (L/100 km, km per litre or mpg) and the fuel price. Choose round trip to double the distance. The calculator gives the fuel cost, the fuel used and the cost per km and per mile.
Fuel used is distance multiplied by consumption. The calculator converts between L/100 km, km per litre and US or UK mpg exactly.
The formula
Cost = distance × fuel used per km × price per litre
- L/100 km
- litres used per 100 km (lower is better)
- km/L, mpg
- distance per unit of fuel (higher is better)
Worked example
300 km in a car that does 15 km per litre, fuel at ₹103 a litre
- Fuel: 300 ÷ 15 = 20 litres
- Cost: 20 × 103 = ₹2,060
- Round trip: ₹4,120
Things to keep in mind
- Tolls, parking and wear on the car aren't included.
Questions people ask
Why does my real mileage differ?
Speed, traffic, air conditioning and load all change consumption; official figures are usually optimistic.
How do I split it with passengers?
Use the carpool cost calculator.
Are US and UK mpg the same?
No. A UK gallon is about 20% larger, so the same car shows a higher UK mpg figure.