Website Carbon Footprint
Measure the ecological impact of any website via the Website Carbon API.
Website carbon footprint is computed from total page weight, CO2 per byte transferred (avg 0.81g CO2/GB), and green hosting coefficient. Compared to global average. Useful for ESG reports and sustainability KPI optimisation.
How to Reduce Your Carbon Footprint
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Enter the website URL to analyze
The system measures page size and checks hosting via Green Web Foundation
CO₂ per view, annual footprint, and sustainability rating are calculated
Why measure website carbon footprint?
The internet consumes about 4% of global electricity. Every page load generates CO₂. Understanding carbon footprint is the first step toward building a greener and faster website.
CO₂ Calculation
Carbon emission estimation based on page size and data center energy consumption model.
Green Web Check
Hosting verification through The Green Web Foundation database.
Comparison
Comparison with the median website and sustainability rating.
Common Mistakes
Best Practices
What is a Website Carbon Footprint?
Every website visit consumes energy — in data centres, networks, and end-user devices. This energy produces CO₂ emissions. The carbon footprint depends on page weight, hosting energy source, and visitor volume. Lighter pages, efficient code, and green hosting providers reduce environmental impact. Grades range from A+ (cleanest) to F (heaviest footprint).
Frequently Asked Questions
How is website carbon footprint calculated?
The volume of data transferred when loading a page is calculated and multiplied by the average CO₂ emission factor of the power grid. Factors include: page size, green hosting status, and number of views.
What affects carbon footprint?
Key factors: total page weight (HTML, CSS, JS, images, fonts), CDN usage, green hosting (renewable energy), and client-side caching.
What is "green hosting"?
Green hosting is a hosting provider that uses renewable energy sources (solar, wind) or purchases carbon offset credits. Verified through The Green Web Foundation database.
How to reduce website carbon footprint?
Optimize images (WebP/AVIF), minify CSS/JS, use a CDN, enable caching, choose green hosting, and remove unused scripts and fonts.
Related guides
Longer-form reading on this topic from the knowledge base.
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