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Carbon Footprint per Mile Calculator

Enter trip distance and your vehicle's mpg to estimate CO₂ emissions.

For general information only — not medical advice. Consult a qualified professional for any health decision.

Burning one US gallon of gasoline releases about 8.89 kg of CO₂. This tool takes your trip distance and fuel economy to estimate the total and per-mile emissions of a car journey.

Drive greener
Small changes add up.
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Frequently asked questions

How much CO₂ per gallon of gas?

About 8.89 kg (roughly 19.6 lbs) of CO₂ per US gallon of gasoline burned.

How can I lower it?

Drive fewer miles, keep steady speeds, maintain tyre pressure, or switch to a more efficient or electric vehicle.