Carbon Footprint Calculator
Annual CO₂e from driving, flying, home and diet.
Enter your values
Enter the car miles per year you are working with.
Enter the car fuel economy in mpg.
Enter the short-haul flights per year you are working with.
Enter the long-haul flights per year you are working with.
Enter the electricity per month in kWh.
Choose one of: Heavy meat, Average, Low meat, Vegetarian, Vegan.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Total footprint
- 13.4 tonnes CO₂e/year
- Driving
- 2.96 t
- Flying
- 2.1 t
- Home electricity
- 3.84 t
- Diet
- 2.5 t
- Versus global average (4.7 t)
- 285%
| Change | Annual saving |
|---|---|
| Cut driving by half | 1.48 t |
| Skip one long-haul flight | 1.60 t |
| Switch to a vegetarian diet | 0.8 t |
Quick answer
The global average footprint is about 4.7 tonnes CO₂e per person per year; the US average is around 15 tonnes.
At a glance
| What it does | Annual CO₂e from driving, flying, home and diet. |
|---|---|
| Category | Everyday |
| Inputs needed | Car miles per year, Car fuel economy, Short-haul flights per year, Long-haul flights per year, Electricity per month, Diet |
| Main output | Total footprint |
| Cost | Free — no sign-up, no download |
How to use the Carbon Footprint Calculator
- 1Enter your annual driving and flying.
- 2Add your monthly electricity use.
- 3Pick the diet that best matches yours.
Inputs explained
- Car miles per year
- Enter the car miles per year you are working with.
- Car fuel economy(mpg)
- Enter the car fuel economy in mpg.
- Short-haul flights per year
- Enter the short-haul flights per year you are working with.
- Long-haul flights per year
- Enter the long-haul flights per year you are working with.
- Electricity per month(kWh)
- Enter the electricity per month in kWh.
- Diet
- Choose one of: Heavy meat, Average, Low meat, Vegetarian, Vegan.
Worked example
Using the values the calculator loads with:
Inputs
- Car miles per year10000
- Car fuel economy30 mpg
- Short-haul flights per year2
- Long-haul flights per year1
- Electricity per month800 kWh
- DietAverage
Results
- Total footprint13.4 tonnes CO₂e/year
- Driving2.96 t
- Flying2.1 t
- Home electricity3.84 t
- Diet2.5 t
- Versus global average (4.7 t)285%
Frequently asked questions
What's the biggest lever for most people?
Flying and driving. One long-haul return flight can outweigh a year of careful recycling.
Are offsets a fix?
They help but they're not equivalent to not emitting — reduce first, then offset the remainder with a verified provider.
What do I need to enter into the Carbon Footprint Calculator?
Just 6 values: car miles per year, car fuel economy, short-haul flights per year, long-haul flights per year, electricity per month, diet. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Carbon Footprint Calculator work out the answer?
The global average footprint is about 4.7 tonnes CO₂e per person per year; the US average is around 15 tonnes. The working is shown step by step so you can verify the result by hand.
Is the Carbon Footprint Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.