> For the complete documentation index, see [llms.txt](https://knowledge.co2ai.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://knowledge.co2ai.com/provide-product-emissions-data/how-to-calculate-pcf.md).

# How to calculate PCF

> Did you know: You can use the Product Ecosystem free calculator to estimate your PCF

**Allocation based** – a deductive approach where PCF is derived from the total company emission and the product's share in the company's revenue (or other proxy)

**Product analysis based** – an inductive approach where the PCF value is derived from an actual analysis of the products scope 1, 2 and 3 related emissions. See [Scope 3 Calculation Guidance](https://ghgprotocol.org/sites/default/files/standards/Scope3_Calculation_Guidance_0.pdf).

See [PCF Allocation Guidance](https://ecosystem.co2ai.com/files/allocation_guidance.pdf)

See [PCF Calculation methodology](https://ecosystem.co2ai.com/files/calculation_methodology.pdf)