Carbon Footprint Calculator
Calculate your personal carbon footprint from transportation, home energy, travel, and lifestyle. Compare to averages and find ways to reduce emissions.
Transportation
mi/yr
mpg
mi/yr
Home Energy
$
/mo
$
/mo
Air Travel
/yr
/yr
Lifestyle & Diet
🔒 Fast, free math calculators that run in your browser. No uploads, 100% private.
Last updated: January 2026
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Frequently Asked Questions
What is a carbon footprint?
Your carbon footprint is the total greenhouse gases (mainly CO₂) you produce through daily activities—driving, flying, home energy use, food choices, and purchases. It's measured in metric tons of CO₂ per year.
What is the average carbon footprint?
The average American produces about 16 tons CO₂/year—among the world's highest. The global average is 4-5 tons. Climate scientists suggest we need to reach 2 tons per person to limit warming.
What has the biggest impact on carbon footprint?
For most people: 1) Transportation (especially flying and driving), 2) Home energy use, 3) Diet (meat production is carbon-intensive), 4) Consumer purchases. One transatlantic flight = 1+ ton CO₂.
How can I reduce my carbon footprint?
Drive less (bike, walk, public transit), fly less, switch to renewable energy, eat less meat, reduce waste, and buy less stuff. Small daily changes compound over time.
What is carbon offsetting?
Carbon offsetting means paying to reduce emissions elsewhere to compensate for yours (e.g., funding tree planting or renewable energy). It's controversial—reducing your own emissions is generally better.