Carbon Footprint Calculator

Personal annual CO2 from transport, home, food, and goods.

Car km/week

Fuel Type

Flights per year

Avg flight hours (one-way)

Electricity (kWh/month)

Natural gas (m³/month)

Diet

Goods & services ($/month)

Tab to move between fields

Total CO2 (tonnes/year)

17.13

Transport (tonnes)4.74

Home energy (tonnes)5.69

Food (tonnes)2.5

Goods & services (tonnes)4.2

% of world average365%

% of US average117%

Trees to offset779

How to Use This Calculator

Enter your weekly car driving distance in km and select fuel type.
Set number of round-trip flights per year and average flight hours.
Enter monthly electricity (kWh) and natural gas (m³) usage, and select dietary pattern.
Review Total CO₂ (tonnes/year) and breakdown by transport, home energy, diet, and goods.
Identify your largest emission source and explore reduction strategies for that category first.

How the result changes with Electricity (kWh/month)

Car km/week: Average kilometres driven per week.
Fuel Type: Select vehicle fuel type
Flights per year: Number of round-trip flights per year.
Avg flight hours (one-way): Average duration of a one-way flight in hours.
Electricity (kWh/month): Monthly household electricity consumption in kWh.
Natural gas (m³/month): Monthly natural gas usage in cubic metres.
Diet: Select dietary pattern
Goods & services ($/month): Monthly spending on consumer goods and services.

Total CO2 (tonnes/year): Total annual carbon footprint in metric tonnes CO2e.
Transport (tonnes): Annual CO2 from car and air travel.
Home energy (tonnes): Annual CO2 from electricity and natural gas.
Food (tonnes): Annual CO2e from diet based on Poore & Nemecek (2018).
Goods & services (tonnes): Annual CO2 from consumer spending (EIO-LCA model).
% of world average: Your footprint as a percentage of the global average (4.7 t).
% of US average: Your footprint as a percentage of the US average (14.7 t).
Trees to offset: Approximate mature trees needed to absorb your annual CO2 (22 kg/tree/year).

Identify Input Parameters
4 parameters
Car km/week = 150, Fuel Type = 0, Flights per year = 2, Avg flight hours (one-way) = 4 = 8 input(s) provided
Calculate Total CO2
Total CO2 = transportTotal + homeTotal + foodTotal + goodsTotal
17.13 = 17.13
Calculate Transport
Transport = transportCarAnnual + transportFlightAnnual
4.74 = 4.74
Calculate Home energy
Home energy = electricityAnnual + gasAnnual
5.69 = 5.69