A walkthrough, end to end.
- 1
Enter trip distance, your vehicle's fuel economy, and the fuel price.
- 2
Pick MPG (US) or L/100km units.
- 3
See total fuel needed, total cost, and optional split per passenger.
Trip fuel cost
Fuel needed = distance / mpg (or distance × L100km / 100). Total cost = fuel × price.
What you can do with this.
Road trip planning
Budget gas for a long-distance drive.
Reimbursement check
Sanity-check mileage reimbursement.
Group travel
Split fuel cost evenly between passengers.
Comparing routes
Decide if a longer-but-faster route is worth it.
Vehicle comparison
Cost difference between two vehicles for the same trip.
Commute cost
Total fuel cost over a year of commuting.
Camper/RV trip
Plan fuel stops on a long itinerary.
Fuel cost 2026 — what's current
Standard arithmetic; calculator wins for instant unit conversion.
Frequently asked.
Toggle units — US MPG and metric L/100km both supported.
For electric vehicles use kWh/mi or kWh/100km in place of MPG and electricity price.
Per gallon (MPG mode) or per litre (L/100km mode).
No. All math runs in your browser.