Emission factor finder
Look up a published emission factor by what it is for — diesel, grid electricity in India or another country, cement, business travel — and see its gases, basis and the table it came from.
- 10,277 factors from 7 public sources
- Gases, GWP basis and the publisher's table reference on every row
- Searches are not stored
438 factors · US EPA Emission Factors Hub 2025
| Activity | Detail | Region · year | Factor | Gases | Source · reference |
|---|---|---|---|---|---|
| HFC-41Refrigerants and gases | CH3F · 100-year GWP (AR5)kg CO2e per kg released | Global · 2013 | 116 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 11 | |
| HFC-43-10meeRefrigerants and gases | CF3CHFCHFCF2CF3 · 100-year GWP (AR5)kg CO2e per kg released | Global · 2013 | 1,650 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 11 | |
| MethaneRefrigerants and gases | CH4 · 100-year GWP (AR5)kg CO2e per kg released | Global · 2013 | 28 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 11 | |
| Nitrogen trifluorideRefrigerants and gases | NF3 · 100-year GWP (AR5)kg CO2e per kg released | Global · 2013 | 16,100 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 11 | |
| Nitrous oxideRefrigerants and gases | N2O · 100-year GWP (AR5)kg CO2e per kg released | Global · 2013 | 265 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 11 | |
| PFC-116Refrigerants and gases | C2F6 · 100-year GWP (AR5)kg CO2e per kg released | Global · 2013 | 11,100 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 11 | |
| PFC-14Refrigerants and gases | CF4 · 100-year GWP (AR5)kg CO2e per kg released | Global · 2013 | 6,630 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 11 | |
| PFC-218Refrigerants and gases | C3F8 · 100-year GWP (AR5)kg CO2e per kg released | Global · 2013 | 8,900 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 11 | |
| PFC-31-10Refrigerants and gases | C4F10 · 100-year GWP (AR5)kg CO2e per kg released | Global · 2013 | 9,200 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 11 | |
| PFC-318Refrigerants and gases | c-C4F8 · 100-year GWP (AR5)kg CO2e per kg released | Global · 2013 | 9,540 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 11 | |
| PFC-41-12Refrigerants and gases | C5F12 · 100-year GWP (AR5)kg CO2e per kg released | Global · 2013 | 8,550 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 11 | |
| PFC-51-14Refrigerants and gases | C6F14 · 100-year GWP (AR5)kg CO2e per kg released | Global · 2013 | 7,910 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 11 | |
| PFC-91-18Refrigerants and gases | C10F18 · 100-year GWP (AR5)kg CO2e per kg released | Global · 2013 | 7,190 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 11 | |
| Refrigerant R-401ARefrigerants and gases | Blend · 100-year GWP (AR5, HFC/PFC constituents only)kg CO2e per kg released; HCFC constituents are not counted (Montreal Protocol gases) | Global · 2025 | 18 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 12 | |
| Refrigerant R-401BRefrigerants and gases | Blend · 100-year GWP (AR5, HFC/PFC constituents only)kg CO2e per kg released; HCFC constituents are not counted (Montreal Protocol gases) | Global · 2025 | 15 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 12 | |
| Refrigerant R-401CRefrigerants and gases | Blend · 100-year GWP (AR5, HFC/PFC constituents only)kg CO2e per kg released; HCFC constituents are not counted (Montreal Protocol gases) | Global · 2025 | 21 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 12 | |
| Refrigerant R-402ARefrigerants and gases | Blend · 100-year GWP (AR5, HFC/PFC constituents only)kg CO2e per kg released; HCFC constituents are not counted (Montreal Protocol gases) | Global · 2025 | 1,902 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 12 | |
| Refrigerant R-402BRefrigerants and gases | Blend · 100-year GWP (AR5, HFC/PFC constituents only)kg CO2e per kg released; HCFC constituents are not counted (Montreal Protocol gases) | Global · 2025 | 1,205 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 12 | |
| Refrigerant R-403BRefrigerants and gases | Blend · 100-year GWP (AR5, HFC/PFC constituents only)kg CO2e per kg released; HCFC constituents are not counted (Montreal Protocol gases) | Global · 2025 | 3,471 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 12 | |
| Refrigerant R-404ARefrigerants and gases | Blend · 100-year GWP (AR5, HFC/PFC constituents only)kg CO2e per kg released; HCFC constituents are not counted (Montreal Protocol gases) | Global · 2025 | 3,943 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 12 | |
| Refrigerant R-406ARefrigerants and gases | Blend · 100-year GWP (AR5, HFC/PFC constituents only)kg CO2e per kg released; HCFC constituents are not counted (Montreal Protocol gases) | Global · 2025 | 0 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 12 | |
| Refrigerant R-407ARefrigerants and gases | Blend · 100-year GWP (AR5, HFC/PFC constituents only)kg CO2e per kg released; HCFC constituents are not counted (Montreal Protocol gases) | Global · 2025 | 1,923 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 12 | |
| Refrigerant R-407BRefrigerants and gases | Blend · 100-year GWP (AR5, HFC/PFC constituents only)kg CO2e per kg released; HCFC constituents are not counted (Montreal Protocol gases) | Global · 2025 | 2,547 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 12 | |
| Refrigerant R-407CRefrigerants and gases | Blend · 100-year GWP (AR5, HFC/PFC constituents only)kg CO2e per kg released; HCFC constituents are not counted (Montreal Protocol gases) | Global · 2025 | 1,624 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 12 | |
| Refrigerant R-407DRefrigerants and gases | Blend · 100-year GWP (AR5, HFC/PFC constituents only)kg CO2e per kg released; HCFC constituents are not counted (Montreal Protocol gases) | Global · 2025 | 1,487 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 12 | |
| Refrigerant R-408ARefrigerants and gases | Blend · 100-year GWP (AR5, HFC/PFC constituents only)kg CO2e per kg released; HCFC constituents are not counted (Montreal Protocol gases) | Global · 2025 | 2,430 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 12 | |
| Refrigerant R-409ARefrigerants and gases | Blend · 100-year GWP (AR5, HFC/PFC constituents only)kg CO2e per kg released; HCFC constituents are not counted (Montreal Protocol gases) | Global · 2025 | 0 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 12 | |
| Refrigerant R-410ARefrigerants and gases | Blend · 100-year GWP (AR5, HFC/PFC constituents only)kg CO2e per kg released; HCFC constituents are not counted (Montreal Protocol gases) | Global · 2025 | 1,924 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 12 | |
| Refrigerant R-410BRefrigerants and gases | Blend · 100-year GWP (AR5, HFC/PFC constituents only)kg CO2e per kg released; HCFC constituents are not counted (Montreal Protocol gases) | Global · 2025 | 2,048 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 12 | |
| Refrigerant R-411ARefrigerants and gases | Blend · 100-year GWP (AR5, HFC/PFC constituents only)kg CO2e per kg released; HCFC constituents are not counted (Montreal Protocol gases) | Global · 2025 | 15 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 12 | |
| Refrigerant R-411BRefrigerants and gases | Blend · 100-year GWP (AR5, HFC/PFC constituents only)kg CO2e per kg released; HCFC constituents are not counted (Montreal Protocol gases) | Global · 2025 | 4 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 12 | |
| Refrigerant R-414ARefrigerants and gases | Blend · 100-year GWP (AR5, HFC/PFC constituents only)kg CO2e per kg released; HCFC constituents are not counted (Montreal Protocol gases) | Global · 2025 | 0 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 12 | |
| Refrigerant R-414BRefrigerants and gases | Blend · 100-year GWP (AR5, HFC/PFC constituents only)kg CO2e per kg released; HCFC constituents are not counted (Montreal Protocol gases) | Global · 2025 | 0 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 12 | |
| Refrigerant R-417ARefrigerants and gases | Blend · 100-year GWP (AR5, HFC/PFC constituents only)kg CO2e per kg released; HCFC constituents are not counted (Montreal Protocol gases) | Global · 2025 | 2,127 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 12 | |
| Refrigerant R-422ARefrigerants and gases | Blend · 100-year GWP (AR5, HFC/PFC constituents only)kg CO2e per kg released; HCFC constituents are not counted (Montreal Protocol gases) | Global · 2025 | 2,847 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 12 | |
| Refrigerant R-422DRefrigerants and gases | Blend · 100-year GWP (AR5, HFC/PFC constituents only)kg CO2e per kg released; HCFC constituents are not counted (Montreal Protocol gases) | Global · 2025 | 2,473 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 12 | |
| Refrigerant R-424ARefrigerants and gases | Blend · 100-year GWP (AR5, HFC/PFC constituents only)kg CO2e per kg released; HCFC constituents are not counted (Montreal Protocol gases) | Global · 2025 | 3,104 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 12 | |
| Refrigerant R-426ARefrigerants and gases | Blend · 100-year GWP (AR5, HFC/PFC constituents only)kg CO2e per kg released; HCFC constituents are not counted (Montreal Protocol gases) | Global · 2025 | 1,371 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 12 | |
| Refrigerant R-428ARefrigerants and gases | Blend · 100-year GWP (AR5, HFC/PFC constituents only)kg CO2e per kg released; HCFC constituents are not counted (Montreal Protocol gases) | Global · 2025 | 3,417 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 12 | |
| Refrigerant R-434ARefrigerants and gases | Blend · 100-year GWP (AR5, HFC/PFC constituents only)kg CO2e per kg released; HCFC constituents are not counted (Montreal Protocol gases) | Global · 2025 | 3,075 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 12 | |
| Refrigerant R-507ARefrigerants and gases | Blend · 100-year GWP (AR5, HFC/PFC constituents only)kg CO2e per kg released; HCFC constituents are not counted (Montreal Protocol gases) | Global · 2025 | 3,985 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 12 | |
| Refrigerant R-508ARefrigerants and gases | Blend · 100-year GWP (AR5, HFC/PFC constituents only)kg CO2e per kg released; HCFC constituents are not counted (Montreal Protocol gases) | Global · 2025 | 11,607 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 12 | |
| Refrigerant R-508BRefrigerants and gases | Blend · 100-year GWP (AR5, HFC/PFC constituents only)kg CO2e per kg released; HCFC constituents are not counted (Montreal Protocol gases) | Global · 2025 | 11,698 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 12 | |
| Sulfur hexafluorideRefrigerants and gases | SF6 · 100-year GWP (AR5)kg CO2e per kg released | Global · 2013 | 23,500 kg CO₂e per kgAR5 · Scope 1 | US EPA Emission Factors Hub 2025Table 11 | |
| Purchased steam and heatSteam and heat | Natural gas at 80% thermal efficiency | United States · 2025 | 66.3981 kg CO₂e per mmBtuAR5 · Scope 2 | CO₂ 66.33 · CH₄ 0.00125 · N₂O 0.000125 | US EPA Emission Factors Hub 2025Table 7 |
| Aviation gasolineTransport fuels | Mobile combustion CO2 (CH4/N2O depend on vehicle — Tables 3–5)Tank-to-wheel | United States · 2025 | 8.31 kg CO₂e per gallonAR5 · Scope 1 | CO₂ 8.31 | US EPA Emission Factors Hub 2025Table 2 |
| Biodiesel (100%)Transport fuels | Mobile combustion CO2 (CH4/N2O depend on vehicle — Tables 3–5)Tank-to-wheel; biogenic CO2 excluded from CO2e | United States · 2025 | 0 kg CO₂e per gallonAR5 · Scope 1 | CO₂ 9.45 | US EPA Emission Factors Hub 2025Table 2 |
| Compressed natural gas (CNG)Transport fuels | Mobile combustion CO2 (CH4/N2O depend on vehicle — Tables 3–5)Tank-to-wheel | United States · 2025 | 0.05444 kg CO₂e per scfAR5 · Scope 1 | CO₂ 0.05444 | US EPA Emission Factors Hub 2025Table 2 |
| Diesel fuelTransport fuels | Mobile combustion CO2 (CH4/N2O depend on vehicle — Tables 3–5)Tank-to-wheel | United States · 2025 | 10.21 kg CO₂e per gallonAR5 · Scope 1 | CO₂ 10.21 | US EPA Emission Factors Hub 2025Table 2 |
| Ethanol (100%)Transport fuels | Mobile combustion CO2 (CH4/N2O depend on vehicle — Tables 3–5)Tank-to-wheel; biogenic CO2 excluded from CO2e | United States · 2025 | 0 kg CO₂e per gallonAR5 · Scope 1 | CO₂ 5.75 | US EPA Emission Factors Hub 2025Table 2 |
The sources in the library
Each source is loaded from the publisher's own files, with its edition and licence recorded. ESGTrack watches each publisher's page for a new edition.
| Source | Publisher | Edition | Factors | Basis | Licence |
|---|---|---|---|---|---|
| CO2 Baseline Database for the Indian Power Sector | Central Electricity Authority, Government of India · publisher page | 22.0 · 2026-08-01 | 123 | CO2 only | Government of India publication — free to use with attribution |
| GHG Emission Factors Hub | U.S. Environmental Protection Agency · publisher page | 2025 · 2025-01-15 | 438 | AR5 (waste: AR4) | U.S. Government work — public domain |
| 2006 IPCC Guidelines for National Greenhouse Gas Inventories, Volume 2: Energy | Intergovernmental Panel on Climate Change · publisher page | 2006 (default factors) · 2006-04-01 | 386 | AR5 and AR6 variants | IPCC — reproduced with attribution for inventory use |
| CO2 Baseline Database v22.0 — power-station data | Central Electricity Authority, Government of India · publisher page | 22.0 · 2026-08-01 | 1,262 | CO2 only | Government of India publication — free to use with attribution |
| Supply Chain Greenhouse Gas Emission Factors v1.3 (NAICS-6, spend-based) | U.S. Environmental Protection Agency · publisher page | 1.3.0 · 2024-07-10 | 985 | AR5 | U.S. Government work — public domain |
| Carbon intensity of electricity generation, by country | Our World in Data (Ember, Energy Institute) · publisher page | 2026 release · 2026-01-01 | 2,191 | Lifecycle (Ember) | CC BY 4.0 — Our World in Data, based on Ember and the Energy Institute |
| 2006 IPCC Guidelines and 2019 Refinement — industrial processes, waste and agriculture defaults | Intergovernmental Panel on Climate Change · publisher page | 2006 / 2019 (Tier 1 defaults) · 2019-05-01 | 4,892 | AR5 and AR6 variants | IPCC — reproduced with attribution; machine-readable values from bonsai-ipcc (MIT) |
Not shown here: India Specific Road Transport Emission Factors (India GHG Program (WRI India, CII, TERI)), its publisher asks that its terms be checked before the values are republished. It is available inside the product.
How to read a factor
A factor only means something with its basis: the unit (per litre, per kilogram, per GJ on a net calorific value basis, per kWh), the gases it covers, the global warming potentials used to combine them, the region and the year. Two factors for "diesel" can legitimately differ by a few per cent because of the calorific value or density assumed. Record which one you used, and keep its reference.
For grid electricity in India, prefer the CEA's weighted average for the activity year if it is published before you report; otherwise the latest available, and say which. The Our World in Data figures are lifecycle intensities, useful for countries without a national factor but not a like-for-like substitute for one.
What this tool does not do
- It shows bundled public sources only — not factors imported on an installation, not a company's private library, and not supplier-specific factors.
- It does not choose a factor for you, convert units, or apply your fuel's measured calorific value — the product does those, with the decision recorded.
- Publishers update their editions; the edition shown here is the one bundled, with its date.
Questions about the factor finder
Which sources are included?
The public sources bundled with ESGTrack: the IPCC 2006 Guidelines and the 2019 Refinement, the Central Electricity Authority's CO2 Baseline Database version 22.0 — both the grid averages and the power-station rates — the US EPA's GHG Emission Factors Hub (2025) and Supply Chain GHG Emission Factors v1.3, and Our World in Data's grid intensities for 212 countries. The India GHG Program's road transport factors are in the product but not shown here, because the programme asks that its terms are checked before its values are republished.
What do the columns mean?
CO₂, CH₄ and N₂O are kilograms of each gas per unit of activity; CO₂e combines them with the global warming potentials named in the GWP column (AR4, AR5, AR6, or "CO₂ only" where the publisher gives only carbon dioxide). The scope column is a hint about where the factor usually belongs; the reference is the publisher's table, so you can check the value at source.
Can I use these factors in my inventory?
They are published values, reproduced with their sources. Whether one fits your activity — the fuel, its calorific value, the year, the country, the basis — is a methodological decision for your inventory, which should record the factor used and why.
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Factors chosen by date, with the decision recorded
ESGTrack applies the factor in force for each month, keeps your own site and company factors first, converts units, and logs every change with its source.