The typical page loads 14 stylesheets weighing 77 KB

1

At a glance the headline numbers for Stylesheets per page

How many stylesheets the page loads and their over-the-wire weight.

14

stylesheet count

on the typical page

77 KB

CSS weight

on the typical page

153 KB

1 in 4 pages exceed this

CSS weight

189,915

sites measured

all-device field data

The typical page loads 14 stylesheets weighing 77 KB.

The State of Web Vitals · Q2 2026 · 189,915 sites · all devices field datacorewebvitals.io/state-of-cwv

2

Distribution & median LCP site count and median LCP at each level of stylesheets per page — n

0ms 750ms 1500ms 2250ms 3000ms

2.5s

0 14431 28862

0 1–2 3–4 5–6 7–10 11–15 16–24 25–38 39–60 61–95 >p98

Good (≤2.5s) Needs improvement Poor (>4s) Site count

The State of Web Vitals · Q2 2026 · 189,915 sites · all devices field datacorewebvitals.io/state-of-cwv

3

Passing LCP by stylesheets per page — n which level passes the LCP most often

Stylesheets per page — nSitesPassing LCPLCP

0 11,457 83% 1.4s

1–2 14,216 91% 1.2s

3–4 16,418 91% 1.3s

5–6 14,012 91% 1.3s

7–10 23,312 88% 1.4s

11–15 22,644 87% 1.4s

16–24 28,862 83% 1.5s

25–38 26,937 77% 1.7s

39–60 19,838 68% 2.0s

61–95 8,672 66% 2.0s

>p98 3,547 72% 1.8s

Good Needs Improvement Poor Faded rows: under 100 sites

Stylesheets per page — n 14. p75 29. p99 118. Spearman with LCP r = +0.31. At the low end (0): LCP 1.4s. At the high end (>p98): LCP 1.8s. computed

The State of Web Vitals · Q2 2026 · 189,915 sites · all devices field datacorewebvitals.io/state-of-cwv

4

Distribution & median LCP site count and median LCP at each level of stylesheets per page — size

0ms 750ms 1500ms 2250ms 3000ms

2.5s

0 28841 57681

0 0.1–0.247 0.247–0.61 0.61–1.5 1.5–3.72 3.72–9.17 9.17–22.6 22.6–55.9 55.9–138 138–341 341–841 >p98

Good (≤2.5s) Needs improvement Poor (>4s) Site count

The State of Web Vitals · Q2 2026 · 189,915 sites · all devices field datacorewebvitals.io/state-of-cwv

5

Passing LCP by stylesheets per page — size which level passes the LCP most often

Stylesheets per page — sizeSitesPassing LCPLCP

0 967 87% 1.3s

0.1–0.247 419 97% 1.0s

0.247–0.61 1,021 91% 1.2s

0.61–1.5 1,864 89% 1.2s

1.5–3.72 2,743 87% 1.3s

3.72–9.17 5,337 88% 1.2s

9.17–22.6 13,693 89% 1.3s

22.6–55.9 39,617 89% 1.3s

55.9–138 57,681 84% 1.5s

138–341 36,766 73% 1.8s

341–841 8,885 68% 1.9s

>p98 3,430 56% 2.3s

Good Needs Improvement Poor Faded rows: under 100 sites

Stylesheets per page — size 77 KB. p75 153 KB. p99 1.2 MB. At the low end (0 KB): LCP 1.3s. At the high end (>p98): LCP 2.3s. computed

The State of Web Vitals · Q2 2026 · 189,915 sites · all devices field datacorewebvitals.io/state-of-cwv

6

Why this matters for the Core Web Vitals, and where to start fixing it

Every blocking stylesheet is a render gate. The browser paints nothing until the last one arrives, so the count multiplies the risk: more requests on the critical path, more chances that one of them is the slow one.

Few files beat many here. The request side costs more than the byte side: one round trip on a cold connection outweighs a lot of kilobytes on a warm one. Bundle the critical CSS into as few files as the architecture allows.

How does CSS affect the Core Web Vitals?

Stylesheets per page correlates with the LCP. CSS weight separates passing sites from failing sites more than stylesheet count does. Where the CSS weight is low, 87% of sites pass the LCP. Where it is high, 56% do. The decline is gradual. There is no point where sites suddenly start failing.

Go fix it Eliminate render-blocking resources → Remove unused CSS →