Fuel Cost Calculator — Trip Cost from Distance and Fuel Economy
CalculatorA fuel cost calculator divides distance by fuel economy to get the fuel needed, then multiplies by the price per liter for the trip cost.
What is it
Trip fuel cost is distance ÷ fuel economy × fuel price. Fuel economy in km/L is the distance per liter, while the European L/100km metric is the fuel used per 100 km — they are reciprocals (L/100km = 100 ÷ km/L). Real-world economy varies with traffic, air conditioning, and load, so treat the result as an estimate.
fuel needed (L) = distance (km) ÷ economy (km/L); cost = fuel needed × price per liter; L/100km = 100 ÷ (km/L)
How to use
- 1Enter the trip distance in km.
- 2Enter your fuel economy in km/L.
- 3Enter the fuel price per liter and check the fuel needed and total cost.
Reference
| km/L | L/100km | Cost per 100km (price 1,700/L) |
|---|---|---|
| 8 | 12.5 | 21250 |
| 10 | 10 | 17000 |
| 15 | 6.7 | 11333 |
| 20 | 5 | 8500 |
Sources & standards
- Fuel economy label calculations - U.S. DOE / EPA
- NIST Guide to the SI: conversion factors - NIST
- SI Brochure: The International System of Units - BIPM
FAQ
How much does a 400km trip cost at 12 km/L and 1,700 per liter?
400 ÷ 12 ≈ 33.3L of fuel, so the trip costs about 56,667.
How do I convert km/L to L/100km?
They are reciprocals: L/100km = 100 ÷ (km/L). For example, 12.5 km/L equals 8 L/100km.
Is fuel cost calculator input sent to a server?
No. This tool runs in your browser and does not send input to a server.