Carbon Footprint Calculator
Estimate your annual CO2 footprint across transport, home energy, diet and shopping, see how it compares to the world average, and find out how many trees it would take to offset it.
Fill in your annual estimates — leave 0 for items that don't apply.
Disclaimer. Emissions figures are estimates based on standard published emission factors (grid electricity, fuel, diet); actual footprint depends on your specific energy mix, vehicle efficiency and consumption patterns, which vary by region. Read full disclaimer →
About Carbon Footprint Calculator
A personal carbon footprint is total annual CO2-equivalent greenhouse gas emissions from your activities. World average: approximately 4.7 tonnes CO2-equivalent per person per year. India average: about 1.9 tonnes. The Paris Agreement target requires bringing individual footprints below 2 tonnes by 2050. Emission factors used: grid electricity in India approximately 0.71 kg CO2 per kWh; petrol 2.31 kg CO2 per litre; beef approximately 27 kg CO2 per kg.
Highest-impact personal actions: switch to EV or public transport (transport is 20-30% of footprint); adopt a plant-rich diet (food is 20-30% of footprint); install rooftop solar (home energy is 15-25% of footprint); avoid long-haul flights (one return long-haul flight generates 1.5-3 tonnes CO2-equivalent). Carbon offsets are a last resort - direct emissions reduction is always preferable to offsetting unavoidable emissions.
Formula Used In This Calculator
Transport = Car km × 0.17 kg CO₂/km ÷ 1000; Aviation = Flight hours × 0.204 t CO₂/hour (ICAO-style estimate); Home Energy = (Electricity kWh/month × 12 × 0.436 kg CO₂/kWh ÷ 1000) + (Gas m³/month × 12 × 2.2 kg CO₂/m³ ÷ 1000); Diet is taken directly from your selected diet type (1.5–3.3 t CO₂/year); Shopping = Items/year × 0.02 t CO₂. All components are summed to your total annual footprint, then compared against a 4-tonne world average reference and converted into trees needed to offset (total ÷ 22 kg CO₂ per tree per year).