Carbon Footprint Checker

Estimate the CO₂ emissions of any webpage

Enter a URL to see estimated CO₂ emissions per visit, powered by co2.js and the Sustainable Web Design model v4.

Note

Results are estimates useful for comparing pages or tracking changes over time — treat them as a guide, not a precise measurement.

Enter a domain or full URL

Rating scale

A+ Excellent ≤ 0.095 g CO₂e per visit
A Very good ≤ 0.186 g CO₂e per visit
B Good ≤ 0.341 g CO₂e per visit
C Average ≤ 0.493 g CO₂e per visit
D Below average ≤ 0.656 g CO₂e per visit
E Poor ≤ 0.846 g CO₂e per visit
F Very high > 0.846 g CO₂e per visit