carbonlog-cf/README.md

DEFRA conversion factors for carbon footprint calculations

# CarbonLog Conversion Factors (`carbonlog-cf`)

📦 DEFRA 2025 conversion factors and multipliers for carbon footprint calculations.  
Built for use in **CarbonLog Business** and compatible with any TypeScript/JavaScript project.

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## ✨ Features

- DEFRA 2025 UK conversion factors (Scope 1–3).
- Lookup by activity, category, subcategory, unit, and GHG type.
- Automatic calculation of **CO₂e, CO₂, CH₄, and N₂O**.
- Includes COICOP & SIC multipliers.
- Written in **TypeScript** with full type definitions.
- Unit-tested with **Vitest**.

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## 🚀 Installation

```bash
npm install carbonlog-cf
# or
yarn add carbonlog-cf
# or
pnpm add carbonlog-cf
```