Carbon Footprint Calculator

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🌍 Carbon Footprint Calculator
Estimate your annual CO₂ emissions from transportation, home energy, diet, and shopping — and see how you compare to global averages.
🚗 Transportation
Miles driven per year

Car fuel type

Short flights per year

Long flights per year

🏠 Home Energy
Monthly electricity bill ($)

Home heating type

Monthly heating bill ($)

Renewable energy?

🥩 Diet
Diet type

Food waste level

🛍 Shopping & Lifestyle
Monthly shopping spend ($)

New clothes per year (items)

Electronic devices bought/yr

tonnes of CO₂ per year

Transport (t CO₂)
Home energy (t CO₂)
Diet (t CO₂)
Shopping (t CO₂)
📊 Emissions by category
🚗
Transport
🏠
Home energy
🥩
Diet
🛍
Shopping
🌐 How you compare
Your footprint
US average
14.5 t CO₂/yr
World average
4.7 t CO₂/yr
Paris Agreement target
2.0 t CO₂/yr
Trees needed to offset yours
💡 Biggest ways to reduce your footprint

What is a carbon footprint?

Your carbon footprint is the total amount of greenhouse gases — primarily CO₂ — that your lifestyle generates each year. It covers everything from the fuel your car burns to the food on your plate and the electricity powering your home. The average American produces about 14.5 tonnes of CO₂ per year, nearly three times the global average.

How is the calculation done?

This calculator uses emission factors from EPA and IPCC research to estimate CO₂ equivalent emissions across four major categories: transportation, home energy use, diet, and consumer goods.

What’s the Paris Agreement target?

The 2015 Paris Agreement aims to limit global warming to 1.5°C. Scientists estimate this requires global per-capita emissions to fall to around 2 tonnes of CO₂ per year by 2050.

Frequently Asked Questions

What has the biggest impact on my carbon footprint?
For most Americans, the top three are: flying, driving a gasoline car, and diet (especially red meat). Switching even one of these has more impact than years of recycling.
How much does diet affect emissions?
A meat-heavy diet produces roughly 3.3 tonnes of CO₂ per year, while a vegan diet produces about 1.5 tonnes. Beef is particularly emission-intensive — about 27 kg of CO₂ per kg of beef.
Does switching to an EV actually help?
Yes. EVs produce roughly 50–70% less lifetime CO₂ than gasoline cars in the US, even accounting for manufacturing emissions and the current electricity grid mix.
Can I offset my carbon footprint by planting trees?
Trees help, but it takes a mature tree 20–50 years to absorb 1 tonne of CO₂. Reducing emissions directly is far more effective than relying on offsets.

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