Carbon Footprint Calculator

Estimate an annual carbon footprint across energy, travel, food and consumption.

About Carbon Footprint Calculator

The result is the signed sum of its components: positive items are added and deductions subtracted. Expressing it as a share of the positive components shows how much of the gross figure survives to the bottom line. Working the emissions inventory up from its components makes clear which line is moving it, which a single headline number hides.

Formula

Carbon Footprint

Annual Carbon Footprint = Electricity emissions from annual kWh + Heating emissions + Car travel emissions + Flight emissions + Food and consumption emissions − Verified offsets purchased

Electricity emissions from annual kWh: Component of the emissions inventory
Heating emissions: Component of the emissions inventory
Car travel emissions: Component of the emissions inventory
Flight emissions: Component of the emissions inventory
Food and consumption emissions: Component of the emissions inventory
Verified offsets purchased: Component of the emissions inventory

Worked example

With the default values below, Carbon Footprint Calculator returns Annual Carbon Footprint of 8,400.0. Change any input above and every figure here is recalculated in your browser.

Inputs used

Electricity emissions from annual kWh: 1,200 kg CO2e
Heating emissions: 1,800 kg CO2e
Car travel emissions: 2,000 kg CO2e
Flight emissions: 900 kg CO2e
Food and consumption emissions: 2,500 kg CO2e
Verified offsets purchased: 0 kg CO2e

Results

Annual Carbon Footprint: 8,400.0
Total Positive Components: 8,400.0
Total Deductions: 0.0
Result as Share of Positive Components: 100.00%
Verdict: Positive — the components net to a surplus

Step by step

1Values used
2Carbon Footprint
3Annual Carbon Footprint= 8,400.0
4Total Positive Components= 8,400.0
5Total Deductions= 0.0
6Result as Share of Positive Components= 100.00
7Verdict= Positive — the components net to a surplus

Assumptions and limits

The result is derived only from the 6 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax or fees or charges into account.
Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How is Carbon Footprint calculated?

Annual Carbon Footprint = Electricity emissions from annual kWh + Heating emissions + Car travel emissions + Flight emissions + Food and consumption emissions − Verified offsets purchased The result is the signed sum of its components: positive items are added and deductions subtracted. Expressing it as a share of the positive components shows how much of the gross figure survives to the bottom line.

Why does Carbon Footprint matter?

Working the emissions inventory up from its components makes clear which line is moving it, which a single headline number hides.

What values do I need to enter?

This calculator takes 6 inputs: Electricity emissions from annual kWh, Heating emissions, Car travel emissions, Flight emissions, Food and consumption emissions, Verified offsets purchased. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.