Greenhouse Gas Converter Calculator
CO2 equivalent from methane, N2O, and other GHGs.
Inputs
Results
Total CO2e (tonnes)
102.76
CO2 contribution (tonnes)100
CH4 as CO2e (tonnes)1.4
N2O as CO2e (tonnes)1.37
SF6 as CO2e (tonnes)0
HFC-134a as CO2e (tonnes)0
CF4 as CO2e (tonnes)0
CH4 share of total (%)1.4%
Non-CO2 share (%)2.7%
How to Use This Calculator
- Enter CO₂ (tonnes), CH₄ (kg), N₂O (kg), SF₆ (kg), HFC-134a (kg), and CF₄/PFC (kg).
- Select GWP time horizon (100-year standard or 20-year short-lived emphasis).
- Review Total CO₂e (tonnes) and each gas's contribution in CO₂ equivalent.
- Use 20-year GWP to emphasize near-term methane impacts in time-sensitive reporting.
How the result changes with CO2 (tonnes)
| CO2 (tonnes) | Total CO2e (tonnes) |
|---|---|
| 100,000,000 | 100,000,002.76 |
| 350,000,000 | 350,000,002.76 |
| 650,000,000 | 650,000,002.76 |
| 900,000,000 | 900,000,002.76 |
What each input means
- CO2 (tonnes)
- Carbon dioxide emissions in metric tonnes.
- Methane CH4 (kg)
- Methane emissions in kilograms.
- Nitrous oxide N2O (kg)
- Nitrous oxide emissions in kilograms.
- SF6 (kg)
- Sulfur hexafluoride emissions in kilograms.
- HFC-134a (kg)
- HFC-134a (refrigerant) emissions in kilograms.
- CF4 / PFC (kg)
- Perfluoromethane (CF4) emissions in kilograms.
- GWP Time Horizon
- Select global warming potential time horizon
What each result means
- Total CO2e (tonnes)
- Total greenhouse gas emissions expressed as CO2 equivalent.
- CO2 contribution (tonnes)
- CO2 component (GWP = 1).
- CH4 as CO2e (tonnes)
- Methane converted to CO2 equivalent using GWP.
- N2O as CO2e (tonnes)
- Nitrous oxide converted to CO2 equivalent.
- SF6 as CO2e (tonnes)
- Sulfur hexafluoride converted to CO2 equivalent.
- HFC-134a as CO2e (tonnes)
- HFC-134a converted to CO2 equivalent.
- CF4 as CO2e (tonnes)
- CF4 converted to CO2 equivalent.
- CH4 share of total (%)
- Methane's share of total CO2e emissions.
- Non-CO2 share (%)
- Percentage of total from non-CO2 greenhouse gases.
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersCO2 (tonnes) = 100, Methane CH4 (kg) = 50, Nitrous oxide N2O (kg) = 5, SF6 (kg) = 0 = 7 input(s) provided
- Calculate Total CO2eTotal CO2e = co2eCO2 + co2eCH4 + co2eN2O + co2eSF6 + co2eHFC + co2eCF4102.76 = 102.76
- Calculate CO2 contribution100 = 100
- Calculate CH4 as CO2eCH4 as CO2e = (ch4Kg * gwp.ch4) / 10001.4 = 1.4
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