---
title: "Gas Mileage Calculator: Miles Per Gallon | MCC Solutions"
description: "Enter miles driven and gallons used to get your miles per gallon, gallons per 100 miles and cost per mile. Free and private."
url: "https://mcc-solutionsnj.com/tools/gas-mileage-mpg-calculator"
---

Free tool

# Gas mileage (MPG) calculator

Fill the tank, reset the trip meter, and fill again. Enter the miles and the gallons it took.

Miles driven

Gallons used

Price per gallon ($) (optional)

Run a small business, or do the books for one? Take the [free books check](/bookkeeping/health-check) or browse the [free Excel templates](/bookkeeping/templates). Want a hand? [Contact us](/contact).

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How it works

## How it works

**MPG = miles driven divided by gallons used.** Gallons per 100 miles is the reverse view. Add the price per gallon to see the cost per mile.

Example: 300 miles on 10 gallons is 30 miles per gallon, or 3.33 gallons per 100 miles. At $3.50 a gallon the fuel cost is $35.00, or about 11.7 cents a mile. Measure over several fill-ups for a steadier number, since a single tank can be skewed by how full the pump left it.

FAQ

## About this calculator

**How do I measure MPG?**

Fill the tank, note the odometer, drive, then fill again. Divide the miles by the gallons added.

**Why does it change?**

Speed, traffic, weather, load and tire pressure all affect fuel use.

**Is the dashboard number accurate?**

It can be off by a little. Measuring a full tank to a full tank is usually closer.

**Is anything saved?**

No. The math runs in your browser and nothing you enter is sent to us.

Read the guide: [How to Figure Gas Mileage and Trip Fuel Cost](/tools/guides/how-to-figure-gas-mileage-and-trip-cost). See [all free tools](/free-tools). More free tools: [Flooring and tile calculator](/tools/flooring-and-tile-calculator), [Length converter](/tools/length-converter), [Golden ratio calculator](/tools/golden-ratio-calculator), or [see all free tools](/free-tools).

General information, not tax or legal advice. [How we write and check our tools](/editorial-standards).

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## Need help with your business?

[Contact us](/contact)[Call (908) 444-6373](tel:+19084446373)