A data-led personal footprint calculator covering your whole lifestyle - with a score, badges, and a decade projection.
Create a free account to save your results, track year-on-year progress, and access professional carbon project tools.
This free calculator estimates your personal carbon footprint across eight lifestyle categories: home energy (gas, electricity and heating), transport (car, public transit and cycling), flights, food and diet, shopping and consumer goods, digital usage, pets and waste. Results are expressed in tCO₂e per year - the standard unit used by the UK Government and the Intergovernmental Panel on Climate Change (IPCC).
The Carbon Score (0–1000) converts your raw tCO₂e figure into a scaled index based on the UK average annual footprint of approximately 8.5 tonnes. A score of 500 represents the UK average. Scores above 700 indicate a below-average footprint; scores below 300 suggest a footprint significantly above average. The Activity Score rewards low-carbon behaviours regardless of absolute emissions - taking public transport, eating plant-based meals and avoiding long-haul flights all improve your Activity Score.
Emission factors are drawn from UK DESNZ 2025 conversion factors, DEFRA guidelines and IPCC AR6. The calculator uses activity-based accounting aligned with the Greenhouse Gas Protocol and BSI PAS 2060. Flight emissions include a radiative forcing multiplier of 1.9× to account for the additional warming effect of contrails at altitude.
If you work in carbon project development, The Carbon Workbench also offers professional tools for biochar carbon calculators, project feasibility modelling, forestry and ARR calculators, and a methodology selector to find the right Gold Standard or Verra standard for your project type.