What is gram CO2e?

Gram of CO2 equivalent (g CO2e) is a small-scale carbon emissions unit. It is used to express the carbon footprint of individual products, food items, and short journeys where emissions are minimal.

What is tonne CO2e?

Tonne of CO2 equivalent (t CO2e) is the standard large-scale unit for national and industrial carbon accounting. It is used in emissions trading schemes, sustainability reports, and international climate agreements.

Worked examples

1 gram CO2e = 0.000001 tonne CO2e

1 tonne CO2e = 1,000 kilogram CO2e

More Carbon Emissions conversions

• Convert gram CO2e to kilogram CO2e
• Convert gram CO2e to tonne CO2e
• Convert gram CO2e to watt hour CO2e equivalent
• Convert gram CO2e to kilowatt hour CO2e equivalent
• Convert gram CO2e to megawatt hour CO2e equivalent

Assumption: electricity-to-CO2 uses 0.385 kg CO2e per kWh (≈2597 Wh per kg CO2e). Actual factors vary by country, grid mix, and year.