3 days ago2 min read
How We Calculate Website Carbon
Climate UX measures real page weight, hosting status, and performance — and turns them into a single carbon number using the Sustainable Web Design (SWD) model. Here's what that means, where the numbers come from, and how we handle edge cases. Why does this show a different number than websitecarbon.com ? Both tools use the SWD model but differ in two ways. (1) Green hosting credit: we apply a 50% reduction to the full transfer; websitecarbon v4 applies the discount only to