# How do I calculate emission intensity per tonne of product for BRSR?

Canonical: https://senseible.earth/answers/brsr-intensity-per-tonne-of-product

Divide Scope 1 plus Scope 2 emissions for the year by the tonnes of product made in the same year and boundary. 9,000 t CO2e over 30,000 t of output gives 0.30 t CO2e per tonne. Name the product and unit, and keep the same denominator every year.

## Pick the denominator

- Tonnes of finished product from production records, not sales, so stock changes do not distort it.
- For several products, use a common unit (tonnes, or tonnes of a reference product) and explain it.
- Keep the same plants in the numerator and denominator.

## Why add it

Revenue intensity moves with prices. A physical intensity shows whether the plant actually makes each tonne with less carbon, which buyers and lenders understand.

## Watch for

- Seasonal or partial years: compare like with like.
- Captive power sold outside: subtract its share before dividing.

## Worked example

- Scope 1: 3,600 t CO2e. Scope 2: 5,400 t CO2e. Total 9,000 t CO2e.
- Output: 30,000 t of castings.
- Intensity = 9,000 / 30,000 = 0.30 t CO2e per tonne.

Illustrative figures.

## What Senseible does here

Senseible reads kWh, litres and kg from electricity bills and fuel invoices into a dated record per site, with the factor and source on every line, and prepares BRSR drafts from that data. Reports are self-declared drafts.

- [Which intensity metric to use](https://senseible.earth/answers/which-carbon-intensity-metric-to-use)
- [Emissions fell but intensity rose](https://senseible.earth/answers/emissions-fell-but-intensity-rose)
- [Seasonal factory intensity](https://senseible.earth/answers/seasonal-factory-emissions-intensity)

Sources: [GHG Protocol Corporate Standard](https://ghgprotocol.org/corporate-standard), [SEBI, BRSR and BRSR Core circulars (sebi.gov.in)](https://www.sebi.gov.in)

Last reviewed 2026-10-23.