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Carbon Footprint Calculator

Estimate your annual carbon footprint from transport and home energy.
Decision Context
Page-specific guidance for using this result in a real planning decision.

This calculator estimates emissions from travel, energy, and lifestyle inputs so you can see where your footprint is concentrated before choosing reductions.

Use it for personal sustainability planning, awareness campaigns, and prioritizing the activities that create the largest share of emissions.

Read the total together with the category breakdown, because reduction planning is more effective when it targets the biggest contributors first.

Calculator
Enter your values
Analysis
Interpretation of the current calculator output

Enter values to see detailed analysis and insights.

How to Use

Step-by-step instructions
  1. 1Enter annual miles driven and your car's MPG.
  2. 2Enter average monthly electricity (kWh) and gas (therms) usage.
  3. 3Enter total flight hours per year.
  4. 4The calculator will estimate your annual CO2 emissions in metric tons.

Total Emissions

Sums the CO2 emissions from driving, electricity usage, natural gas usage, and air travel.
Total = Car + Home + Flights

Variables:

Car(Miles / MPG) x 8.89 kg
EleckWh x 0.386 kg
GasTherms x 5.3 kg
FlightHours x 90 kg

Example

Average User

Inputs:

Miles:10,000
MPG:25
Elec:500 kWh/mo
Flights:10 hours

Steps:

  1. 1.Car = (10000/25) * 8.89 = 3556 kg
  2. 2.Elec = 500 * 12 * 0.386 = 2316 kg
  3. 3.Flights = 10 * 90 = 900 kg
  4. 4.Total = 6772 kg = 6.77 tons
Result:
6.77 Metric Tons

Frequently Asked Questions

What is a good footprint?

The global average is about 4 tons per person. The US average is significantly higher, around 16 tons.
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