Carbon Footprint Calculator – Personal CO2 Emissions
Estimate your annual carbon footprint from transportation, home energy, and diet.
About This Calculator
Estimate your annual carbon footprint from transportation, home energy, and diet. Use the calculator above for instant results.
Worked Examples
- Car: 3,803 lbs | Home: 4,174 lbs | Flights: 2,200 lbs
- Total: 5.1 tons CO2 | Below US average of 16 tons
Answer: 5.1 tons CO2/year
- 20K miles, 18mpg, 1500kWh, 6 flights → 17+ tons
Answer: 17+ tons / year
- EV + solar + no flights → under 2 tons
Answer: Under 2 tons
Who Uses This Calculator?
Measure your personal carbon footprint.
Environmental impact assessment.
Identify biggest emission sources.
Compare EV vs gas environmental impact.
Common Mistakes to Avoid
❌ Underestimating diet impact
Beef and dairy have high carbon footprints not included here. A vegan diet saves ~1.5 tons CO2/year vs average American diet.
❌ Carbon offsets don't reduce your footprint
Offsets fund emission reductions elsewhere. Actual behavior change reduces your direct footprint. Both matter.
Frequently Asked Questions
US average carbon footprint?
About 16 tons CO2 per person per year — highest among developed nations. Global average: ~4 tons. Paris Agreement target: 2 tons by 2050.
Biggest reductions?
In order: eliminate gas car (2-3 tons), one fewer transatlantic flight (1.7 tons), plant-based diet (0.5-1.5 tons), solar panels (1-2 tons).
Carbon offset cost?
$10-50 per ton. Offsets are not a substitute for reducing emissions but can address unavoidable ones.