MPG and Trip Fuel Cost Calculator
Find out your car’s real gas mileage and how much each trip costs.
- Never leaves your device
- No sign-up
Your car’s real gas mileage
| MPG | 11.84 mi/gal |
| Gallons per 100 miles | 8.44 gal |
| Cost per mile | 0.523 |
| Trip cost | 235.22 |
How much will a trip cost
| Gallons needed | 66.67 gal |
| Trip cost | 412.67 |
Quick answer: To calculate MPG, fill up the tank, reset the trip odometer and, at the next fill-up, enter the miles driven and the gallons you pumped: MPG = miles ÷ gallons. To plan a trip, enter the distance, your car’s MPG and the gas price to see the gallons and the cost.
How to do it in 3 steps
- 1Enter miles driven and gallons.
- 2Plan a trip with distance and MPG.
- 3See the gallons and the cost.
Why use Pronto Arquivo
Real MPG
Plus gallons per 100 miles, the measure on new window stickers.
Trip cost
Gallons and dollars for any distance.
Cost per mile
Handy for rideshare and delivery drivers.
Your own numbers
Uses your actual fill-up, not the EPA estimate.
Guides
Measuring at the pump
Fill up until the pump clicks off, reset the trip odometer, and fill up the same way next time. Average two or three tanks for a more accurate MPG.
Frequently asked questions
How do I calculate my car’s MPG?
Miles driven ÷ gallons pumped.
How do I calculate the gas cost of a trip?
Distance ÷ MPG × price per gallon.
How do I convert L/100 km to MPG?
Divide 235.2 by the L/100 km figure: 8 L/100 km is about 29.4 US MPG.
Why is my MPG lower than the sticker?
City driving, short trips, cold weather, roof racks and aggressive acceleration all lower real-world MPG.
