0.023 g
cleaner than an estimated 97.2% of pages on the web
- A+
- A
- B
- C
- D
- E
- F
A+ is 0.04 g or less per view, F is more than 0.359 g CO₂e.
The numbers
- 0.030 g CO₂e
- <0.001 g CO₂e
- unknown
- 284 ms
- 0
- 8 ms
At 10,000 views a month this page emits about 2.7 kg CO₂e a year, roughly 11 km in an average petrol car. The estimate assumes 75% new and 25% returning visitors, a measured cache reload ratio of 0%, and world-average grid intensity. How we calculate this
What to fix
apply everything → ~0.012 g/visit, rating A+
Audit third-party servicessave ~0.010 g/visit (94 kB)Medium impact · moderate effort
1 third-party domain account for 189 kB (93% of the page).
Remove services that no longer earn their place; load the rest on interaction (facades for embeds, delayed consent-gated tags). Each third party is also a privacy and performance dependency.
- www.gov.uk189 kB
Verify your hosting energyMedium impact · moderate effort
This host has not published renewable energy evidence with the Green Web Foundation, so its energy source is unknown.
Choose a provider listed in the Green Web Directory, or ask your current provider to publish evidence (and a carbon.txt). This cuts the data-center share of every single page view.
- carbon.txtNo carbon.txt found at the site root; publishing one is the lightest first step.
Remove the entry redirectAdvisory · quick fix
The address that was scanned goes through 1 redirect before the document is served, ending at https://www.gov.uk/. Every hop is a full round trip on a connection that has not warmed up yet.
Point links, sitemaps and canonical tags at the final address, and make the host redirect in one hop rather than chaining http to https to www.
- https://gov.uk/redirects to https://www.gov.uk/
Where the bytes are
- Fonts66 kB · 2 req
- JavaScript54 kB · 5 req
- CSS44 kB · 2 req
- Images25 kB · 6 req
- HTML14 kB · 1 req
Ten heaviest requests
| Resource | Type | Wire size | Cache-Control |
|---|---|---|---|
| www.gov.uk/assets/frontend/application-3924fa74e28e2597f5fbb9033e66ad5d9618f3373fd5cda8cc217f5ddfec259d.css | stylesheet | 42 kB | max-age=31536000, public, immutable |
| www.gov.uk/assets/frontend/application-1ea51dbe0af9c6701a9a45f87392119934f8ca3f2da7bc78f139a90ecf343dec.js | script | 40 kB | max-age=31536000, public, immutable |
| www.gov.uk/assets/frontend/light-94a07e06a1-v2-01565b0034e61d4609689bbb7ae0be844701f3812c8fe029fa1659b7ef3aa94f.woff2 | font | 34 kB | max-age=31536000, public, immutable |
| www.gov.uk/assets/frontend/bold-b542beb274-v2-35bf540bb39615b6a517986f3aa83f7fefa1efd1878603eeeb196488078542d1.woff2 | font | 32 kB | max-age=31536000, public, immutable |
| www.gov.uk/assets/frontend/govuk-crest-9f82a3631d8ac5feb4660345a2b44ca98f077b48248f2cc139a0f412355bebef.svg | image | 15 kB | max-age=31536000, public, immutable |
| gov.uk/ | document | 14 kB | max-age=300, public |
| www.gov.uk/assets/frontend/govuk_publishing_components/load-analytics-271e37e8217a5a334485ddacf3b89104ab3c51a15fbdba31a9f6a2c54938aa14.js | script | 12 kB | max-age=31536000, public, immutable |
| www.gov.uk/assets/frontend/app-promo/govuk-app-icon-0bca94cf05737106d8e80f32a66f773d7b6ff9b9652fc555917d855914309af0.png | image | 4.7 kB | max-age=31536000, public, immutable |
| www.gov.uk/assets/frontend/homepage/find-a-job-4d38717b0451da3bb223ddea7f681d79e48c1c022da5a08f16aba3f681503150.png | image | 1.8 kB | max-age=31536000, public, immutable |
| www.gov.uk/assets/frontend/homepage/cost-of-living-featured-4cd41cec449e0bd47e707812a5c3b5c52726bed0acb4f31c9b66548cc6ff6309.png | image | 1.6 kB | max-age=31536000, public, immutable |
Share this report
<a href="https://carbonless.cc/report/www.gov.uk"><img src="https://carbonless.cc/api/badge?url=https%3A%2F%2Fwww.gov.uk" alt="Carbon rating for this page" width="150" height="30" loading="lazy" /></a>The badge is a lightweight SVG (under 1 kB) served with long-lived caching, so a new scan can take up to a day to show through.