Free tool · on-device
GHG, energy & water calculator
Scope 1 & 2 emissions, total energy and water withdrawal, straight from activity data. CEA grid factor v21.0, IPCC 2006 fuel factors, every figure cited. Nothing leaves your browser.
- Scope 1 & 2 in tCO₂e, plus intensity per ₹ crore
- Every factor cited to CEA / IPCC with its vintage
- Energy (GJ) and water (kL) in the same place
GHG Emissions Calculator
Electricity
Fuels , enter quantities used (leave others blank)
Fugitive emissions , refrigerant leaked or topped up this year (leave blank if none)
Annual turnover , optional, for intensity
Shared across energy, GHG, and water intensity calculations, enter once.
Results
Your BRSR figure will appear here as you fill in the values above.
Scope 1 factors: IPCC 2006 Guidelines for National GHG Inventories, Vol. 2 (Energy) + GHG Protocol Corporate Standard.
Scope 2 factor: CEA CO₂ Baseline Database for the Indian Power Sector, Version 21.0, FY 2024-25. Update annually from cea.nic.in before filing.
Energy NCV: Calorific values from IPCC 2006 Vol. 2 Table 1.2 / CEA/BEE for Indian coal.
Verify emission factors against latest IPCC, CEA, and BEE publications each filing year. These numbers are indicative, a certified GHG auditor should sign off on final disclosures.
A screening calculation from the figures you enter. For all 108 BRSR fields gap-analysed for your client, run the free readiness report.
What Scope 1, 2 and 3 mean
The GHG Protocol splits a company's emissions into three scopes by where they occur. This tool computes the two that BRSR Core assures, Scope 1 and Scope 2; Scope 3 is a separate screening.
Direct emissions
Fuel you burn on-site or in owned vehicles: diesel gensets, boilers, furnace oil, company cars. You control the source, so you own the emission.
Purchased energy
The grid electricity (and purchased heat or steam) you buy. BRSR uses the location-based grid-average factor; a market-based figure needs contractual instruments.
Value chain
Everything else: suppliers, business travel, commuting, logistics, product use, end-of-life. 15 categories, voluntary under BRSR (a P6 Leadership indicator). Screen it with the Scope 3 tool.
How each factor is derived
Every number here is a published factor, not an estimate. Scope 2 uses the CEA national grid factor; each fuel's factor is its IPCC carbon content times its calorific value; each refrigerant uses its IPCC AR5 100-year global warming potential. Here is the full trail.
| Fuel | Emission factor | Calorific value | Derivation & source |
|---|---|---|---|
| Grid electricity | 0.710 kgCO₂/kWh | — | CEA CO₂ Baseline Database, CEA Version 21.0, FY 2024-25 (location-based national grid average). |
| Diesel (HSD) | 2.68 kgCO₂e/litre | 35.77 MJ/litre | IPCC 2006 Vol.2 Table 1.4, CO₂: 74.1 tCO₂/TJ; NCV Table 1.2, 43.0 MJ/kg × 0.832 kg/L. GHG Protocol Corporate Standard. |
| Petrol (MS) | 2.31 kgCO₂e/litre | 33.3 MJ/litre | IPCC 2006 Vol.2 Table 1.4, CO₂: 69.3 tCO₂/TJ; NCV Table 1.2, 44.3 MJ/kg × 0.752 kg/L. GHG Protocol. |
| CNG / Piped Natural Gas | 1.96 kgCO₂e/m³ | 34.3 MJ/m³ | IPCC 2006 Vol.2 Table 1.4, CO₂: 56.1 tCO₂/TJ; NCV Table 1.2, 34.3 MJ/m³ (standard conditions). GHG Protocol. |
| LPG | 3.02 kgCO₂e/kg | 47.3 MJ/kg | IPCC 2006 Vol.2 Table 1.4, CO₂: 63.1 tCO₂/TJ; NCV Table 1.2, 47.3 MJ/kg. |
| Coal (bituminous) | 2.42 kgCO₂e/kg | 26.2 MJ/kg | IPCC 2006 Vol.2 Table 1.4, CO₂: 94.6 tCO₂/TJ; NCV: CEA/BEE India-average bituminous coal (26.2 MJ/kg). |
| Furnace Oil / HFO | 2.97 kgCO₂e/litre | 38.18 MJ/litre | IPCC 2006 Vol.2 Table 1.4, CO₂: 77.4 tCO₂/TJ; NCV Table 1.2, 40.19 MJ/kg × 0.950 kg/L. |
| Fugitive emissions (refrigerant leakage) — Scope 1 | |||
| R-134a (HFC-134a) | GWP 1,300 (kgCO₂e/kg) | — | IPCC Fifth Assessment Report (AR5), 100-year GWP: HFC-134a = 1,300. |
| R-410A (AC refrigerant) | GWP 1,924 (kgCO₂e/kg) | — | IPCC AR5 100-year GWP, mass-weighted blend of R-32 (677) and R-125 (3,170), 50/50 = 1,924. |
| R-32 (HFC-32) | GWP 677 (kgCO₂e/kg) | — | IPCC AR5 100-year GWP: HFC-32 = 677. |
| R-404A (refrigeration) | GWP 3,943 (kgCO₂e/kg) | — | IPCC AR5 100-year GWP, blend of R-125/R-143a/R-134a (44/52/4 by mass) = 3,943. |
| SF₆ (switchgear) | GWP 23,500 (kgCO₂e/kg) | — | IPCC AR5 100-year GWP: SF₆ = 23,500. |
GWPs are IPCC AR5 100-year (CH₄ = 28, N₂O = 265), aligned with the GHG Protocol. Verify against the latest CEA and BEE publications each filing year.
Common mistakes to avoid
- Counting renewables twice. A rooftop-solar unit consumed on-site is zero Scope 2, but don't also subtract it from your grid-purchase figure.
- Mixing units. The grid factor is per kWh; fuels are per litre, kg or m³. Convert to the factor's unit before you multiply.
- Forgetting process emissions. The calculator now covers refrigerant leakage, but cement calcination, welding gases and other process CO₂ are still Scope 1, add them separately.
- Using a stale grid factor. CEA republishes it every year; a two-year-old factor mis-states every Scope 2 number you file.
Where these numbers go in BRSR
Scope 1 & 2 GHG
The headline emissions figure, plus intensity per rupee of turnover. Assured under BRSR Core for the top listed companies.
Total energy
Electricity + fuel + other sources in joules, with energy intensity. The Energy tab computes it from the same inputs.
Water withdrawal
Withdrawal by source in kilolitres, plus water intensity. The Water tab covers the P6-E3 format.
Frequently asked questions
Which emission factor should I use for grid electricity in India?
The Central Electricity Authority's CO2 Baseline Database for the Indian power sector, using the location-based approach. This calculator uses Version 21.0, which is 0.710 kgCO₂ per kWh and applies to FY 2024-25. The version matters as much as the number: carrying forward an older factor is one of the most common findings raised on an Indian Scope 2 figure, because the arithmetic is right and the basis is stale.
What is the difference between Scope 1 and Scope 2 for BRSR?
Scope 1 is emissions from sources the company owns or controls — diesel in generators, fuel in company vehicles, gas in boilers, and refrigerant leakage. Scope 2 is emissions from electricity the company buys. BRSR Principle 6 asks for both, and both fall inside the BRSR Core attributes, so both need to be defensible.
Where do the fuel factors come from?
The IPCC 2006 Guidelines for National Greenhouse Gas Inventories, Volume 2 (Energy), combined with the GHG Protocol Corporate Standard, using IPCC AR5 100-year global warming potentials. Each fuel also carries its net calorific value, because BRSR asks for energy consumption in joules alongside emissions. Every factor and its citation is listed on the emission factor database page.
Does my data leave my browser?
No. This calculator runs on your device: the activity figures you type are never sent anywhere, never stored, and there is no signup or account. That matters because the inputs are a client's energy and fuel consumption, which most consultants are contractually barred from putting into a third-party system without permission.
Can I use this figure in an assured BRSR filing?
You can use it to assemble and sanity-check the figure, but an assured disclosure needs the underlying records — meter readings, fuel invoices, refrigerant logs — not a calculator output. The value here is that the factors are cited and versioned, so the basis of the number is defensible when an assurer asks what it used.