Gas Mileage Calculator

Calculate vehicle fuel economy from distance traveled and fuel used in either imperial or metric terms.

Preparing Gas Mileage Calculator

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Input

Enter trip distance, fuel consumed, and the matching distance and fuel units to calculate fuel economy. This tool shows the result instantly without step-by-step output.

Input summary

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How to use Gas Mileage Calculator

Provide the trip distance and fuel used, and the calculator will convert that trip record into common fuel-economy measures.

What this calculator is for

This calculator is for checking real-world fuel economy after a tank, a commute, or a road trip instead of relying only on manufacturer ratings.

Tips

Use the distance and fuel from the same measurement interval, such as one full tank or one clearly tracked trip.
Small fill-up errors can move mileage noticeably, so full-tank-to-full-tank tracking is often more reliable than one partial refill.