Gas Mileage Calculator
Calculate miles per gallon (MPG) for your vehicle based on distance traveled and fuel used.
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How to Use This Calculator
- Enter the total miles driven since your last fill-up
- Enter the gallons of fuel used to refill your tank
- Click 'Calculate MPG' to see your fuel efficiency
- View results in both MPG (miles per gallon) and km/L (kilometers per liter)
- Compare your result to your vehicle's EPA rating to assess performance
Formula
MPG = Miles Driven ÷ Gallons Used | km/L = MPG × 0.425144
Frequently Asked Questions
What is MPG and why does it matter?▼
MPG (Miles Per Gallon) measures your vehicle's fuel efficiency - how many miles you can drive on one gallon of gas. Higher MPG means better fuel economy, which saves money and is better for the environment.
How do I measure miles driven and gallons used?▼
Fill your tank completely, note your odometer reading, drive normally, then fill up again. The gallons needed to refill is your 'gallons used', and the difference in odometer readings is your 'miles driven'.
What's a good MPG?▼
It varies by vehicle type. Compact cars: 30-40 MPG is good. Sedans: 25-35 MPG. SUVs: 20-28 MPG. Trucks: 15-25 MPG. Hybrids can achieve 40-60 MPG or more. Compare your results to your vehicle's EPA rating.
What is km/L?▼
Kilometers per liter (km/L) is the metric equivalent of MPG, commonly used outside the United States. The calculator automatically converts your MPG to km/L for international comparison.