CARBON CALCULATOR
instant emission quantification
Deterministic Scope 1, Scope 2, and Scope 3 calculation engine powered by CEA India v22.0, UK DESNZ 2026, and US EPA eGRID factors.
GHG Protocol Scope Calculator
Select an emissions category to compute verified CO₂e equivalents in real-time.
Exact raw equivalent: 1,850 kg CO₂e
Methodology: Calculated using version-locked emission registries (India CEA v22.0, UK DESNZ 2026, US EPA eGRID). Disclosures comply with GHG Protocol Corporate Standard and SEBI BRSR Core guidelines.
How this carbon footprint calculator works
Each input is multiplied by a published emission factor and the results are added up: fuels you burn are Scope 1, electricity you buy is Scope 2, and travel and freight are Scope 3. For Indian grid electricity it uses the Central Electricity Authority factor for FY 2025-26, 0.675 kg CO₂ per kWh. Everything runs in your browser; nothing you type is sent or stored.
| Activity | Emission factor | Scope |
|---|---|---|
| Diesel | 2.687954 kg CO₂e/litre | Scope 1 |
| Petrol | 2.322725 kg CO₂e/litre | Scope 1 |
| Natural gas | 2.023556 kg CO₂e/m³ | Scope 1 |
| Grid electricity, India (CEA v22.0) | 0.675 kg CO₂e/kWh | Scope 2 |
| Grid electricity, UK (DESNZ 2026) | 0.13096 kg CO₂e/kWh | Scope 2 |
| Grid electricity, US (EPA eGRID) | 0.351642 kg CO₂e/kWh | Scope 2 |
| Flight under 1,000 km | 0.158 kg CO₂e/passenger-km | Scope 3 |
| Flight over 1,000 km | 0.102 kg CO₂e/passenger-km | Scope 3 |
| Diesel truck freight | 0.088 kg CO₂e/tonne-km | Scope 3 |
| Rail freight | 0.028 kg CO₂e/tonne-km | Scope 3 |
Year-by-year Indian grid factors, margins and fuel factors are on the India grid emission factor page. To run the same calculation from code, use the emissions API.
Questions
Is this carbon footprint calculator free?
Yes. There is no sign-up and no limit, and the calculation runs in your browser, so nothing you enter leaves your device.
How do I calculate the carbon footprint of my business in India?
Add up three parts. Scope 1: litres of diesel and petrol and cubic metres of gas you burn, times their factors. Scope 2: kWh on your electricity bills times the CEA grid factor (0.675 kg CO2/kWh for FY 2025-26). Scope 3: business travel and freight. The calculator does each step and shows the total in tonnes of CO2e.
Which emission factor does it use for electricity in India?
The Central Electricity Authority's all-India weighted average from the CO2 Baseline Database v22.0: 0.675 kg CO2 per kWh for electricity used in FY 2025-26. For FY 2024-25 bills the CEA factor is 0.710.
Can students use it for a school or college project?
Yes. Enter a household's monthly electricity in kWh from the bill, and litres of petrol or diesel for the car or scooter, to see the footprint in kg and tonnes of CO2e, with the factors used listed below the calculator.
Is the result good enough for BRSR or CBAM reporting?
It is a good estimate. A filed BRSR Core or CBAM report also needs the underlying bills, records per facility and an approval trail, which is what the ZeroCarbon workspace keeps.
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