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CO₂ calculator
Estimate your climate footprint
Choose whether you want to calculate for yourself as an individual, or for your organisation. One question at a time — takes under two minutes.
Context
What does one tonne of CO₂ actually mean?
Emissions can be hard to relate to in the abstract. Here are some concrete examples from a Norwegian and Northern European context.
Average Norwegian
13 t
CO₂e per year, consumption-based (Norwegian Environment Agency 2024)
Oslo-London return
~0.5 t
CO₂e incl. radiative forcing
Oslo-New York return
~3.0 t
CO₂e incl. radiative forcing
Petrol car, 15 000 km/year
~2.6 t
CO₂e (EEA, avg. Norwegian car)
Meat-heavy vs plant-based diet
~1.5 t
CO₂e difference per year (NIBIO)
Methodology and sources
- Flight emissions: ICAO Carbon Emissions Calculator with radiative forcing factor x2.0 (includes non-CO₂ climate effects at altitude)
- Car emissions: European Environment Agency (EEA) 2023, average Norwegian petrol/diesel car ~170 gCO₂/km
- Diet: NIBIO report 2022 / Our World in Data — estimated difference between meat-heavy and plant-based Norwegian diet
- Reference emissions: Norwegian Environment Agency's consumption-based climate accounting for Norway (January 2024) — 13 tCO₂e per person per year, of which over 60% occurs abroad
- Consumption level (goods/services/housing): rough proxy calibrated against the Norwegian Environment Agency's consumption-based total, since this is the largest and fastest-growing category in wealthy countries
All figures are estimates. Actual emissions depend on route, aircraft type, car model, dietary habits, and consumption patterns.