Energy & Carbon
NOTE
Energy & Carbon tracking is available exclusively with a PRO account.
How It Works
Our carbon tracking system analyzes all files loaded on your website to calculate the total data transfer. A page analysis is triggered when:
- The page receives visitor traffic
- At least 3 days have passed since the previous analysis
- The page content has been modified (detected by checking the last-modified header and comparing the HTML against our stored hash)
This intelligent approach prevents unnecessary processing of unchanged assets, conserving both computational resources and energy.
Each analysis is recorded in a historical log specific to that page.
Visitor Load Calculation
We determine how much data each visitor loads by applying a percentage based on their browsing history:
| Visit Type | Asset Load |
|---|---|
| First visit to your website | 100% of page assets |
| First visit to the specific page, but has visited your domain before | 50% |
| Returning visitor to the specific page | 5% |
CO2 Calculations
Our carbon emissions calculations are powered by The Green Web Foundation's CO2.js library.
Digital activities have a carbon footprint, and our goal is to help you understand and reduce yours. The CO2.js library allows us to estimate the environmental impact of your website's data transfer by converting bytes into carbon emissions estimates.
The calculations take into account various factors in the digital supply chain, including network infrastructure, user devices, and data centers.
We automatically check your hosting provider against The Green Web Foundation database to determine if you're using a green hosting service, which can significantly reduce your website's carbon footprint.