Hvordan Kulstofsaftryk Lommeregneren Virker
Denne lommeregner estimerer dit årlige CO₂-fodaftryk i ton CO₂-ækvivalent (tCO₂e) ved at kombinere emissionsfaktorer på tværs af fire livsområder: transport, hjemmeenergi, kost og livsstilsforbrug. Emissionsfaktorer er hentet fra UK Government GHG Conversion Factors, Det Internationale Energiagentur (IEA) og peer-reviewede livscyklusstudier.
Transport Udlednings
Car emissions are calculated using per-kilometre emission factors: petrol (0.180 kg CO₂/km), diesel (0.168), hybrid (0.105) and electric (0.053). Flight emissions use average seat-kilometre factors: short-haul (~255 kg CO₂ per flight) and long-haul (~1,560 kg CO₂ per flight), including radiative forcing uplift. Bus and train emissions use average passenger-kilometre factors (0.089 and 0.041 kg CO₂/km respectively).
Home Energi Udlednings
Elektricitet emissions depend on your regional grid carbon intensity (kg CO₂/kWh). Countries with high renewable or nuclear capacity have very low intensity; coal-heavy grids have high intensity. Natural gas combustion emits approximately 0.203 kg CO₂ per kWh. Home energy is divided equally among household members to reflect your personal share.
Kosteemissioner
Kost har en betydelig indvirkning på emissioner. En kødstor kost genererer ca. 3,3 ton CO₂e/år gennem husdyrproduktion, arealanvendelse og forsyningskæder. En vegansk kost reducerer dette til ca. 1,5 ton. Disse tal inkluderer fødevareproduktion, forarbejdning og transport, men ikke emballage.
Lifestyle Spending
Consumer goods, services and waste contribute approximately 0.5–2.0 tonnes CO₂e/year depending on spending level. This covers manufacturing, packaging, delivery and disposal of goods you purchase.
Ofte stillede spørgsmål
What is a carbon footprint?
A carbon footprint is the total greenhouse gas emissions caused by your activities, expressed in tonnes of CO₂. It includes direct emissions (e.g. petrol you burn) and indirect emissions (e.g. electricity generation, food production).
What is the average carbon footprint per person?
The global average is around 4.7 tonnes CO₂ per year. US residents average around 14 tonnes, UK residents around 5.5 tonnes, and Indian residents around 1.9 tonnes. Scientists suggest we need to reach approximately 2.5 tonnes per person by 2030 to limit warming to 1.5°C.
What has the biggest impact on reducing my footprint?
De højest-virkning individuelle handlinger er: (1) undgå langdistanceflyvninger, (2) skifte fra en benzin-/dieselbil til en EV eller offentlig transport, (3) skifte til en varmepumpe eller VE-energitarif og (4) reducere forbrug af rødt kød og mejeriprodukter. Selv én langdistanceflyvning kan tilføje 1,5–3 ton til dit årlige fodaftryk.
How is electricity carbon intensity calculated?
Kulstofintensitet (kg CO₂/kWh) afspejler, hvor meget CO₂ der udledes for at generere én enhed elektricitet på dit nationale net. Frankrig er meget lav (~0,052) på grund af kernekraft; Norge er næsten nul (~0,010) på grund af vandkraft; Indien (~0,708) og Australien (~0,656) er højere på grund af kulafhængighed.
Tæller CO₂-kompensation overhovedet?
Kulstof offsetting can play a role in a broader strategy, but reducing emissions at source is more reliable than offsets, whose quality varies widely. Use this calculator first to identify your biggest emission sources, reduce where possible, then consider certified high-quality offsets (e.g. Gold Standard) for remaining emissions.
Relaterede lommeregnere
- AI Carbon Footprint Calculator — gCO₂e og kWh per LLM-prompt efter model og netregion. Sammenlign GPT-4o, Claude, Gemini og Llama.
- EV Charging Cost Calculator — Cost per charge, per mile and annual electric running cost vs petrol. Home, public, rapid mix.
- Solar Panel Payback Calculator — Omkostning, produktion, besparelser, SEG-indkomst, tilbagebetaling og 25-årig ROI for private solcelleanlæg.