environmental · Free · Open Source · MIT

Carbon Footprint Calculator

Scope 1+2+3 CO₂e (GHG Protocol). Based on GHG Protocol / ISO 14064-1. Results shown with the full formula so you can verify. Zero signup, zero tracking, zero data sent to a server — all calculation is client-side.

Inputs
Carbon footprint · GHG Protocol
0 kg CO₂e
Scope 1 (direct)
0
Scope 2 (electricity)
0
Scope 3 (value chain)
0
Raw JSON result
{
  "scope1": 0,
  "scope2": 0,
  "scope3": 0,
  "total": 0,
  "unit": "kg CO₂e",
  "regulation": "GHG Protocol / ISO 14064-1"
}
Overview

About the Carbon Footprint Calculator

GHG Protocol Scope 1 + Scope 2 + Scope 3 carbon accounting. Scope 1: direct combustion (vehicles, boilers). Scope 2: purchased electricity (region-specific grid factors). Scope 3: value chain — business travel, waste, etc. Required for CSRD (EU), TCFD-aligned disclosures, and ISO 14064-1 verification.

Formula
Total = Scope1 + Scope2 + Scope3
Regulation

GHG Protocol / ISO 14064-1

How to use

Step-by-step: using the Carbon Footprint Calculator

  1. 1
    Enter activity data (litres diesel, kWh, km flown). The calculator applies GHG Protocol factors.
Who uses this calculator

Used by safety professionals worldwide

Regulation citations

Authoritative sources

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Embed this calculator

Free for any website, blog, or course — MIT / CC BY 4.0. Attribution stays visible.

<script src="https://tools.smartqhse.com/embed.js" data-calc="carbon-footprint-calculator"></script>
Optional attributes: data-theme, data-width, data-min-height. Works on any CMS (WordPress, Webflow, Ghost, plain HTML).
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