Fuel Cost Calculator
Estimate trip fuel cost, fuel used, cost per mile or kilometer, and cost per traveler
Calculation Steps
How Fuel Cost Is Estimated
Trip cost is distance multiplied by fuel use, then by local pump price.
Fuel economy
Imperial fuel economy uses miles per gallon, so fuel used is distance divided by MPG. Metric fuel economy uses liters per 100 km.
Shared trips
Add travelers to split fuel cost per person. The total fuel estimate stays the same, while cost per traveler changes.
CO2 estimate
The gasoline CO2 figure is a rough tailpipe estimate based on fuel burned. Vehicle type and fuel blend can change the actual footprint.
Fuel Cost Examples
Quick estimates for common road-trip and commute scenarios.
Weekend road trip
300 miles at 30 mpg and $3.50/gal = about $35
Shared round trip
Four travelers split the same fuel cost four ways
Metric commute
120 km at 6.5 L/100 km and 1.85/L = about 14.43
Fuel Cost Calculator FAQ
Common questions about MPG, L/100 km, round trips, and real-world fuel costs.
Is fuel economy MPG or liters per 100 km?
In imperial mode, fuel economy is miles per gallon, where higher is better. In metric mode, it is liters per 100 km, where lower is better.
Should I use city, highway, or combined fuel economy?
Use the value that best matches the trip. Highway economy usually fits long road trips, while combined economy is better for mixed driving.
How does round trip mode work?
Round trip mode doubles the entered one-way distance before estimating fuel used, total cost, and cost per traveler.
Why can my real fuel cost differ from the estimate?
Traffic, weather, cargo, tire pressure, terrain, speed, and local fuel prices can all change actual fuel use and total cost.
What does cost per traveler mean?
Cost per traveler divides the total trip fuel cost by the number of travelers. It does not include tolls, parking, maintenance, or depreciation.