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Calcimator

Carbon Footprint Calculator

Estimate your annual carbon footprint from driving, electricity, heating, and air travel. Compare to US and world averages.

Inputs

mi
mpg
kWh
therms

Results

Annual CO₂ (tons)

12.5 tons

vs US Average78.12%
Trees to Offset320
Driving3.81 tons
Electricity4.51 tons
Natural Gas3.18 tons
Flights1 tons

Annual CO₂ (tons)

12.5 tons

How to Use This Calculator
  1. Start by filling in the input fields below. Results update instantly as you type, so you can experiment with different values to see how they affect the outcome.
  2. Miles Driven / Year — Total miles you drive per year. US average is ~13,500. Accepts values from 0 mi to 100,000 mi (default: 12,000 mi).
  3. Vehicle MPG — Your vehicle's fuel efficiency in miles per gallon. Accepts values from 5 mpg to 100 mpg (default: 28 mpg).
  4. Monthly Electricity — US average is ~900 kWh/month. Accepts values from 0 kWh to 10,000 kWh (default: 900 kWh).
  5. Monthly Natural Gas — Monthly natural gas usage in therms. US average is ~50. Accepts values from 0 therms to 500 therms (default: 50 therms).
  6. Round-Trip Flights / Year — Number of round-trip flights per year. Accepts values from 0 to 50 (default: 2).
  7. Once all inputs are set, review your results in the Results panel. Here's what each output means:
  8. Annual CO₂ (tons) — shown as a numeric value. This is the primary result of this calculator.
  9. vs US Average — shown as a numeric value.
  10. Trees to Offset — shown as a numeric value.
  11. Driving — shown as a numeric value.
  12. Electricity — shown as a numeric value.
  13. Natural Gas — shown as a numeric value.
  14. Flights — shown as a numeric value.
  15. View the Emissions by Source below for a visual breakdown of how the numbers relate to each other.
  16. Explore the related calculators below if you need deeper analysis or want to approach this topic from a different angle.
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