Tonnes to CO2e Calculator
Calculate carbon dioxide equivalent emissions with Global Warming Potential values for greenhouse gases and refrigerants. Use the tool for sustainability reporting, HVAC refrigerant estimates, inventories, and emissions documentation.
Tonnes to CO2e Calculator
Enter a gas amount or select a reference gas. Results update automatically.
Result updates automatically.
Formula: CO2e = gas amount x GWP.
How GWP and CO2e Work
Global Warming Potential compares the warming impact of a gas with carbon dioxide over a defined time horizon, commonly 100 years. Carbon dioxide equivalent is calculated by multiplying the mass of a gas by its GWP value.
CO2
GWP 1
CH4
GWP 28
R-134a
GWP 1430
GWP Formula Notes
CO2e = gas mass x GWP. For reverse calculations, gas mass = CO2e / GWP. Always use the reporting standard and assessment report required for your inventory.
Tonnes to CO2e Calculator FAQ
What does CO2e mean?
CO2e means carbon dioxide equivalent. It expresses the climate impact of different gases using carbon dioxide as the reference.
Which GWP value should I use?
Use the value required by your reporting program, regulation, or inventory method. Different standards may use different assessment reports.
Can this estimate refrigerant emissions?
Yes. Enter the leaked or charged refrigerant mass and select the refrigerant GWP to estimate CO2e.