MPG Calculator
Enter miles and gallons to get MPG.
Inputs
Results
MPG
32
Formula
MPG = Miles ÷ Gallons.
Example
320 mi ÷ 10 gal = 32 MPG.
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What drivers get from the MPG Calculator
The MPG Calculator answers a real question about mpg: how much will this trip cost, how far can I go, or how does my car compare to a friend's? It works for gas, diesel, hybrid, and (where relevant) EV vehicles.
Inputs are in the units your dashboard already uses, so you don't have to convert anything before you can get an answer.
Getting reliable numbers
Real-world efficiency depends on speed, terrain, load, weather, and driving style — factors that no single number can capture. Run the MPG Calculator a few times with different assumptions to see the range you're operating in.
Frequently asked questions