# How do I calculate the carbon footprint of a clutch plate?

Canonical: https://senseible.earth/answers/clutch-plate-carbon-footprint-per-piece

Add the steel stampings, springs and friction facings per plate with supplier figures, then add stamping, riveting, heat treatment and testing energy. Divide the plant's energy by plates passed.

## Material

- Steel sheet for the plate and hub.
- Friction facings.
- Springs and rivets.

## Process

- Stamping and heat treatment.
- Riveting and assembly.
- Balancing and testing.

## Per piece

Report per plate by vehicle type, since a truck clutch is much heavier than a two-wheeler one.

## Worked example: clutch plate unit per piece (one month)

- Electricity: 30,000 kWh x 0.710 = 21,300 kg CO2
- PNG: 3,000 SCM x 2.05 = 6,150 kg CO2
- Pieces produced: 50,000
- Plant total: 27,450 / 50,000 = 0.549 kg CO2 per piece
- Add steel and facings for the full figure

Inputs are illustrative; use your own bills and production records.

## What Senseible does here

Senseible reads the plant's electricity bills (CEA grid factor 0.710 kg CO2 per kWh, CO2 Baseline Database version 21.0) and fuel invoices (IPCC 2006 defaults) into a fingerprinted Scope 1 and 2 record, the plant-level input to a per-unit figure. Bought-in materials go to the supplier evidence trail; product reports are self-declared drafts.

- [Product carbon footprint calculator](https://senseible.earth/calculators/product-carbon-footprint)
- [Brake pad footprint](https://senseible.earth/answers/brake-pad-carbon-footprint-per-set)
- [Sheet metal stamping footprint](https://senseible.earth/answers/sheet-metal-stamping-carbon-footprint-per-kg)
- [Automobile industry](https://senseible.earth/industries/automobile)

Sources: [GHG Protocol Product Standard](https://ghgprotocol.org/standards), [ISO 14067:2018, Carbon footprint of products (iso.org)](https://www.iso.org), [IPCC 2006 Guidelines, Volume 2 Energy (fuel defaults)](https://www.ipcc-nggip.iges.or.jp/public/2006gl/vol2.html), [CEA CO2 Baseline Database, version 21.0](https://cea.nic.in/cdm-co2-baseline-database/?lang=en)

Last reviewed 2026-10-20.