Fuel Cost Calculator
Estimate how much fuel a journey needs and what it will cost. Enter the distance in kilometres or miles, your vehicle's fuel efficiency in km/L, L/100 km or mpg (US or UK) and the fuel price per litre or gallon. Tick return trip to double the distance and split the cost between passengers.
Calculate Trip Fuel Cost
Trip fuel cost
Working
How to Use the Fuel Cost Calculator
- Enter the one-way distance and choose km or miles.
- Enter your vehicle's fuel efficiency and its unit.
- Enter the fuel price and whether it is per litre or per gallon.
- Tick return trip or add passengers if needed, then press Calculate.
About This Tool
Road-trippers budgeting a holiday, commuters comparing driving with public transport, and car-poolers sharing costs.
Input: Numbers · Output: Fuel needed and cost.
Features and Limitations
Features
- Mixes units freely: km or miles, km/L, L/100 km, US or UK mpg, price per litre or gallon.
- Return-trip option and cost per person.
- Cost per km or mile.
- Shows the conversion factors used.
Limitations
- Uses one average efficiency; traffic, speed, load and terrain change real consumption.
- Tolls, parking and vehicle wear are not included.
- Results are computed in your browser; nothing you enter is sent to a server.
Example
A 450 km trip in a car doing 15 km/L uses 30 litres; at ₹105 a litre that is ₹3,150. In the US, 300 miles at 30 mpg uses 10 gallons, which costs $35 at $3.50 a gallon.
Frequently Asked Questions
How is fuel cost calculated?
Fuel needed = distance ÷ efficiency (or distance × L/100 km ÷ 100), then cost = fuel needed × price per unit of fuel.
Are US and UK miles per gallon the same?
No. A UK (imperial) gallon is 4.546 litres and a US gallon is 3.785 litres, so the same car shows a higher mpg figure in UK units.
What efficiency figure should I use?
Use your car's real-world average from the trip computer or fuel receipts. Official test figures are usually optimistic.
Does it work for electric cars?
Not directly. Use the Electricity Cost Calculator with the car's kWh per 100 km instead.
Related Tools
More like this: all Everyday & Education tools, all Calculators tools or the TinySandy home page.