Fuel Cost Calculator
Estimate how much fuel a trip will use and what it will cost.
Reviewed by the WorldCalcs team · Methodology · Last reviewed: June 2026
Fuel needed
10.00 gallons
Total cost
35.00
What is a fuel cost calculator?
A fuel cost calculator estimates how much fuel a trip will use and what it will cost, based on the distance, your vehicle's fuel economy and the fuel price.
How it works
In US units it divides the distance by miles per gallon to get gallons, then multiplies by the price per gallon. In metric it uses litres per 100 km. Example: a 300-mile trip at 30 mpg with fuel at 3.50 uses 10 gallons and costs 35.00.
All calculations happen in your browser. Nothing is sent, stored, or tracked.
Results are estimates and may contain errors — for general information only, not professional advice. Always verify before relying on them. Disclaimer
How to use
Choose US or metric units, then enter the trip distance, your vehicle's fuel economy, and the fuel price. The calculator shows the fuel needed and total cost instantly.
All values are rounded to two decimal places. The tool is currency-neutral.