0.036 g
cleaner than an estimated 95.5% 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
- 0.048 g CO₂e
- <0.001 g CO₂e
- unknown
- 104 ms
- n/a
- 7 ms
At 10,000 views a month this page emits about 4.4 kg CO₂e a year, roughly 18 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 → ~0.015 g/visit, rating A+
Audit third-party servicessave ~0.018 g/visit (161 kB)Medium impact · moderate effort
3 third-party domains account for 323 kB (99% 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.googletagmanager.com301 kB
- www.google-analytics.com21 kB
- region1.google-analytics.com0 B
Reduce JavaScript payloadsave ~0.0090 g/visit (81 kB)Medium impact · moderate effort
3 scripts total 323 kB on the wire (916 kB decoded). Bundles this size usually carry a lot of unused code.
Split bundles per route, tree-shake dependencies, and audit with a bundle analyzer or coverage profile. A 25% cut is a conservative target for bundles this size.
- js168 kB
- js133 kB
- analytics.js21 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.
Where the bytes are
- JavaScript323 kB · 3 req
- HTML2.3 kB · 1 req
- Images1.4 kB · 1 req
- Data (fetch)0 B · 1 req
Ten heaviest requests
| Resource | Type | Wire size | Cache-Control |
|---|---|---|---|
| www.googletagmanager.com/gtag/js?id=G-Q43X1ML4PE&cx=c>m=4e6852 | script | 168 kB | private, max-age=900 |
| www.googletagmanager.com/gtag/js?id=UA-136883390-1 | script | 133 kB | private, max-age=900 |
| www.google-analytics.com/analytics.js | script | 21 kB | public, max-age=7200 |
| berkshirehathaway.com/ | document | 2.3 kB | n/a |
| berkshirehathaway.com/geicoimg.gif | image | 1.4 kB | max-age=315360000 |
| region1.google-analytics.com/g/collect?v=2&tid=G-Q43X1ML4PE>m=45je6852v9101784910za20g&_p=1786354522848&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&_eu=AAAI&are=1&cid=1111301417.1786354523&frm=0&ngs=1&pscdl=noapi&rcb=2&sr=1366x850&uaa=x86&uab=64&uafvl=Not%253DA%253FBrand%3B99.0.0.0%7CHeadlessChrome%3B151.0.7922.34%7CChromium%3B151.0.7922.34&uam=&uamb=0&uap=Linux&uapv=&uaw=0&ul=en-us&_s=1&tag_exp=115938466~115938468~118012007~118897920~118897930~119527020~119896802&sid=1786354523&sct=1&seg=0&dl=https%3A%2F%2Fberkshirehathaway.com%2F&dt=BERKSHIRE%20HATHAWAY%20INC.&en=page_view&_fv=1&_ss=1&tfd=434 | fetch | 0 B | no-cache, no-store, must-revalidate |
Share this report
<a href="https://carbonless.cc/report/berkshirehathaway.com"><img src="https://carbonless.cc/api/badge?url=https%3A%2F%2Fberkshirehathaway.com" 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.