What is a carbon footprint?

The total greenhouse gas emissions caused by an individual or organization, expressed as CO₂ equivalent (CO₂e).

What is the average carbon footprint per person?

Global average is ~4 tonnes CO₂e/year. US average is ~16 tonnes. 2.5 tonnes is the sustainable target by 2030 per climate science.

What are the biggest contributors to personal carbon footprint?

Diet (especially beef), air travel, personal vehicle use, and home energy are the largest categories for most individuals.

Carbon Footprint Calculator — Personal & Business

Calculate your personal or business carbon footprint from energy use, travel, diet, and consumption. Get actionable reduction tips.

Car miles driven / year

Fuel efficiency (MPG)

Flights per year (round trips)

Monthly electricity (kWh)

Diet type

🌿 Data Sources: Emission factors from EPA eGRID, IPCC AR6, and EIA. Calculations are estimates for educational and planning purposes. Actual values vary by region, technology, and individual circumstances.

How to use this calculator

1
Enter the physical or chemical quantities
Enter the physical or chemical quantities with correct units into the Carbon Footprint Calculator — Personal & Business input fields.
2
Verify conditions
Verify or adjust the conditions such as temperature, pressure, concentration, or environmental parameters.
3
Apply the scientific formula
Press Calculate to apply the scientific formula or physical law.
4
Compare with reference values
Review the result and compare it with standard reference values, CODATA constants, or published experimental data.

Formula

Result = f(physical quantities, constants, conditions)

physical quantities: Measured values with units entered into the Carbon Footprint.
constants: Physical or chemical constants (e.g. CODATA values, gas constant, Avogadro's number).
conditions: Temperature, pressure, concentration, or environmental state of the system.
Result: Computed physical or chemical quantity with associated units.

Compare results with standard reference values or published experimental data.

Glossary and Definitions

Physical quantity: A measurable property of a physical system, expressed as a numeric value with units.
Constant: A fixed, well-defined value (e.g. a CODATA constant) used across scientific calculations.
Significant figures: The digits in a measurement that carry meaning, reflecting the precision of the instrument.
Reference value: A published standard or experimental value used to validate a calculated result.
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