1
At a glance the headline numbers for Lab paint timeline
Lab paint timeline on a cold crawl: TTFB, FCP, LCP in ms - setup-specific, not field data.
114ms
lab TTFB
on the typical page
366ms
lab FCP
on the typical page
556ms
lab LCP
on the typical page
185,348
sites measured
desktop field data
In the lab, the typical site paints its main content after 556ms.
The State of Web Vitals · Q2 2026 · 189,915 sites · desktop field datacorewebvitals.io/state-of-cwv
2
Distribution & median LCP site count and median LCP at each level of lab paint timeline — ttfb
0ms 750ms 1500ms 2250ms 3000ms
0 43247 86494
0–99 100–199 200–299 300–399 400–499 500–599 600–699 700–799 800–899 900–999 1000+
Good (≤2.5s) Needs improvement Poor (>4s) Site count
The State of Web Vitals · Q2 2026 · 189,915 sites · desktop field datacorewebvitals.io/state-of-cwv
3
Passing LCP by lab paint timeline — ttfb which level passes the LCP most often
Lab paint timeline — ttfbSitesPassing LCPLCP
0–99 86,494 89% 1.2s
100–199 27,580 91% 1.2s
200–299 14,515 91% 1.3s
300–399 10,443 91% 1.4s
400–499 7,871 90% 1.5s
500–599 6,194 88% 1.6s
600–699 4,941 85% 1.6s
700–799 3,939 84% 1.8s
800–899 3,253 81% 1.9s
900–999 2,666 78% 1.9s
1000+ 17,452 56% 2.3s
Good Needs Improvement Poor Faded rows: under 100 sites
Lab paint timeline — ttfb 114ms. p75 399ms. p99 3.4s. At the low end (0–99ms): LCP 1.2s. At the high end (1000+ms): LCP 2.3s. computed
The State of Web Vitals · Q2 2026 · 189,915 sites · desktop field datacorewebvitals.io/state-of-cwv
4
Distribution & median LCP site count and median LCP at each level of lab paint timeline — fcp
0ms 750ms 1500ms 2250ms 3000ms
0 30210 60420
0–249 250–499 500–749 750–999 1000–1249 1250–1499 1500–1749 1750+
Good (≤2.5s) Needs improvement Poor (>4s) Site count
The State of Web Vitals · Q2 2026 · 189,915 sites · desktop field datacorewebvitals.io/state-of-cwv
5
Passing LCP by lab paint timeline — fcp which level passes the LCP most often
Lab paint timeline — fcpSitesPassing LCPLCP
0–249 60,420 93% 1.1s
250–499 52,470 90% 1.3s
500–749 23,166 88% 1.5s
750–999 13,077 85% 1.6s
1000–1249 8,650 80% 1.8s
1250–1499 5,799 73% 2.0s
1500–1749 4,011 67% 2.1s
1750+ 16,127 57% 2.3s
Good Needs Improvement Poor Faded rows: under 100 sites
Lab paint timeline — fcp 366ms. p75 776ms. p99 10.2s. At the low end (0–249ms): LCP 1.1s. At the high end (1750+ms): LCP 2.3s. computed
The State of Web Vitals · Q2 2026 · 189,915 sites · desktop field datacorewebvitals.io/state-of-cwv
6
Distribution & median LCP site count and median LCP at each level of lab paint timeline — lcp
0ms 750ms 1500ms 2250ms 3000ms
0 40835 81670
0–499 500–999 1000–1499 1500–1999 2000–2499 2500–2999 3000–3499 3500–3999 4000–4499 4500+
Good (≤2.5s) Needs improvement Poor (>4s) Site count
The State of Web Vitals · Q2 2026 · 189,915 sites · desktop field datacorewebvitals.io/state-of-cwv
7
Passing LCP by lab paint timeline — lcp which level passes the LCP most often
Lab paint timeline — lcpSitesPassing LCPLCP
0–499 81,670 92% 1.1s
500–999 37,049 89% 1.4s
1000–1499 16,429 81% 1.7s
1500–1999 8,795 73% 2.0s
2000–2499 5,047 62% 2.1s
2500–2999 3,067 57% 2.2s
3000–3499 2,832 60% 2.1s
3500–3999 3,214 77% 1.5s
4000–4499 3,290 79% 1.5s
4500+ 14,786 77% 1.6s
Good Needs Improvement Poor Faded rows: under 100 sites
Lab paint timeline — lcp 556ms. p75 1.4s. p99 19.3s. At the low end (0–499ms): LCP 1.1s. At the high end (4500+ms): LCP 1.6s. computed
The State of Web Vitals · Q2 2026 · 189,915 sites · desktop field datacorewebvitals.io/state-of-cwv
8
Why this matters for the Core Web Vitals, and where to start fixing it
These are lab numbers from our crawler: one cold load, one machine, one network profile. They are not what your visitors feel. That is what the field data on the rest of this site measures. What the lab gives you is a controlled comparison: identical conditions for every site, so a difference between two sites is a real difference between the pages.
Read the gaps. Lab LCP far worse than field LCP usually means caching and repeat visits carry the field numbers. The reverse usually means the crawler's connection is kinder than your visitors' phones.
How does this affect the Core Web Vitals?
Lab paint timeline correlates with the LCP. Lab FCP separates passing sites from failing sites the most. Where the lab FCP is low, 93% of sites pass the LCP. Where it is high, 57% do. The decline is gradual. There is no point where sites suddenly start failing.
Chrome field data from 189,915 sites, representing millions of real page loads. How we measured.