Gas Mileage Calculator
Calculate your car's fuel economy in MPG and cost per mile. Track fuel efficiency and spending for any trip or fill-up.
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gal
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Fuel Economy (MPG)
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Cost per Mile —
Total Fuel Cost —
How to Use This Calculator
- Fill your tank completely and reset your trip odometer.
- Drive normally until your next fill-up.
- Enter the Miles Driven from your trip odometer.
- Enter the Gallons Used at the pump.
- Enter the current Gas Price to see your total fuel cost and cost per mile.
Formula
MPG = Miles Driven / Gallons Used
Cost per Mile = (Gallons × Gas Price) / Miles Driven
Example
You drove 300 miles and used 10 gallons at $3.50/gallon.
- MPG = 300 / 10 = 30 MPG
- Total Cost = 10 × $3.50 = $35.00
- Cost per Mile = $35 / 300 = $0.117/mi
Frequently Asked Questions
- MPG (Miles Per Gallon) = Miles Driven / Gallons Used. Fill your tank, drive until nearly empty, refill and note gallons used and miles driven.
- Average new cars get 25–35 MPG combined. Hybrids achieve 40–60 MPG. Trucks and SUVs typically range from 15–25 MPG. Electric vehicles are rated in MPGe.
- Maintain steady speeds, keep tires inflated, reduce idling, use cruise control on highways, and keep up with maintenance such as air filters and spark plugs.
- City MPG reflects stop-and-go driving, which uses more fuel. Highway MPG reflects steady highway cruising, which is more efficient. Combined MPG averages the two.