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Miles Per Gallon Calculator
Verified formula Updated Jun 2026 Private — runs on your device
Verified formula
Private
Miles per gallon
25.00
For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.
How to use the Miles Per Gallon Calculator
The Miles Per Gallon Calculator works out your miles per gallon in an instant. Enter distance driven and fuel used and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.
- Enter the distance driven.
- Enter the fuel used.
- Read off your miles per gallon — the calculator updates automatically, with no button to press.
Formula
The Miles Per Gallon Calculator uses the formula:
Miles per gallon = Distance driven ÷ Fuel used
Worked example
For example, with distance driven of 300 miles and fuel used of 12 gallons, the miles per gallon is 25.00.
| Distance driven | 300 miles |
|---|---|
| Fuel used | 12 gallons |
| Miles per gallon | 25.00 |
|---|
Results are estimates for educational use, not professional advice.
Frequently asked questions
Divide the miles driven by the gallons of fuel used. Driving 300 miles on 12 gallons is 25 MPG.
Fill the tank, reset the trip meter, drive, then refill and note the gallons added. Divide your trip miles by those gallons.
Yes. Higher MPG means the vehicle travels further on the same fuel, lowering running costs and emissions.
Multiply US MPG by about 0.425 to get km per litre. Use the fuel economy converter for other unit combinations.
Enter the distance driven. Enter the fuel used. Read off your miles per gallon — the calculator updates automatically, with no button to press.
Related guides
Miles Per Gallon Table: Miles per gallon by Distance driven
Reference table of miles per gallon for Miles Per Gallon across a range of distance driven values — exact, engine-computed figures you can read off at a glance.
How to Calculate Miles Per Gallon: Formula, Steps & Examples
Learn how to calculate Miles Per Gallon — the formula explained step by step, with worked examples and a free calculator to check your answer.