The State of Web Vitals

Stylesheets per page

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

Field data PhoneDesktopAll Scope All sites Q2 2026 edition · Phone field outcomes
Metric LCP INP CLS
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
190,130
sites measured
phone field data

The typical page loads 14 stylesheets weighing 77 KB.

The State of Web Vitals · Q2 2026 · 189,915 sites · phone 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 21070 42139
0–4 5–9 10–14 15–19 20–24 25–29 30–34 35–39 40–44 45–49 50+
Good (≤2.5s) Needs improvement Poor (>4s) Site count
The State of Web Vitals · Q2 2026 · 189,915 sites · phone 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
0–4 42,139 89% 1.3s
5–9 32,216 88% 1.4s
10–14 23,832 86% 1.5s
15–19 17,745 82% 1.6s
20–24 15,132 82% 1.6s
25–29 11,541 78% 1.7s
30–34 9,247 75% 1.8s
35–39 7,605 72% 1.9s
40–44 6,048 70% 2.0s
45–49 4,858 66% 2.0s
50+ 19,767 68% 2.0s
Good Needs Improvement Poor Faded rows: under 100 sites

Stylesheets per page — n 14. p75 29. p99 118. At the low end (0–4): LCP 1.3s. At the high end (50+): LCP 2.0s. computed

The State of Web Vitals · Q2 2026 · 189,915 sites · phone 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 29157 58314
0–49 50–99 100–149 150–199 200–249 250–299 300+
Good (≤2.5s) Needs improvement Poor (>4s) Site count
The State of Web Vitals · Q2 2026 · 189,915 sites · phone 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
0–49 58,314 88% 1.3s
50–99 45,576 86% 1.5s
100–149 24,492 79% 1.7s
150–199 15,787 75% 1.8s
200–249 8,427 71% 1.9s
250–299 4,964 70% 1.9s
300+ 15,068 65% 2.1s
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 (0–49 KB): LCP 1.3s. At the high end (300+ KB): LCP 2.1s. computed

The State of Web Vitals · Q2 2026 · 189,915 sites · phone 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, 88% of sites pass the LCP. Where it is high, 65% do. The decline is gradual. There is no point where sites suddenly start failing.

Go fix it Eliminate render-blocking resources → Remove unused CSS →
Related signals Script loading mix → Font source → Image format mix → Iframe loading → Chrome field data from 189,915 sites, representing millions of real page loads · How we measured