Carbon Footprint Calculator
Estimate your annual CO₂ emissions from energy, transport, and flights.
See how it works
Watch a quick simulation of this tool in action — no file needed.
How to use Carbon Footprint Calculator
Follow these steps — everything happens instantly in your browser.
- 1
Step 1. Enter monthly electricity usage in kWh.
- 2
Step 2. Enter monthly natural gas usage in therms.
- 3
Step 3. Enter annual car miles and your car's MPG.
- 4
Step 4. Enter annual flights and average flight duration.
- 5
Step 5. See your total annual CO₂e in tonnes with a source breakdown.
Why use this tool
Frequently asked questions
Everything you might want to know about carbon footprint calculator.
Electricity Cost Calculator
Estimate running cost of any appliance by wattage and hours.
Fuel Cost Calculator
Estimate fuel used and trip cost from distance, efficiency and price.
Savings Goal Calculator
How long until you reach your savings goal — with interest.
Inflation Calculator
How much will today's money be worth in N years? Free, private.