Free Tool
Website Carbon Footprint Calculator
Estimate the CO₂ emissions of any web page. See how your site impacts the environment and get actionable tips to reduce its carbon footprint.
Website Carbon Footprint: Why It Matters
The internet produces approximately 3.7% of global carbon emissions — comparable to the airline industry. Every web page load consumes electricity for data centers, networks, and end-user devices, generating CO₂ in the process.
How Is Website Carbon Calculated?
We estimate carbon emissions using the Shift Project methodology: measuring total data transferred, energy consumption per byte across the full network chain (datacenter, CDN, ISP, device), and the carbon intensity of the electricity grid. Green hosting providers using renewable energy significantly reduce the footprint.
Tips for a Greener Website
- Optimize and compress images (use WebP/AVIF)
- Minimize JavaScript and remove unused code
- Use a green hosting provider
- Enable caching and CDN for repeat visitors
- Use system fonts or subset custom fonts