In the lab, the typical site paints its main content after 556ms

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

185,133

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 1250ms 2500ms 3750ms 5000ms

2.5s

4s

0 20656 41312

0 1–2 3–5 6–10 11–23 24–49 50–107 108–233 234–507 508–1104 1105–2404 >p98

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 3,381 85% 1.3s

1–2 1,079 87% 1.4s

3–5 156 83% 1.6s

6–10 73 82% 1.6s

11–23 9,689 87% 1.3s

24–49 41,312 89% 1.2s

50–107 34,133 89% 1.2s

108–233 29,608 91% 1.2s

234–507 27,860 91% 1.4s

508–1104 22,819 83% 1.7s

1105–2404 11,392 56% 2.3s

>p98 3,631 44% 2.8s

Good Needs Improvement Poor Faded rows: under 100 sites

Lab paint timeline — ttfb 114ms. p75 399ms. p99 3.4s. At the low end (0ms): LCP 1.3s. At the high end (>p98): LCP 2.8s. 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 1250ms 2500ms 3750ms 5000ms

2.5s

4s

0 20358 40715

47–75 76–120 121–191 192–305 306–488 489–779 780–1243 1244–1985 1986–3169 3170–5060 >p98

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

47–75 465 85% 1.1s

76–120 8,318 92% 953ms

121–191 28,433 94% 1.1s

192–305 40,715 92% 1.2s

306–488 33,414 90% 1.3s

489–779 26,520 88% 1.5s

780–1243 19,573 83% 1.7s

1244–1985 12,485 68% 2.1s

1986–3169 6,378 49% 2.5s

3170–5060 3,537 57% 2.2s

>p98 3,670 69% 1.7s

Good Needs Improvement Poor Faded rows: under 100 sites

Lab paint timeline — fcp 366ms. p75 776ms. p99 10.2s. Spearman with LCP r = +0.39. At the low end (47–75ms): LCP 1.1s. At the high end (>p98): LCP 1.7s. 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

2.5s

0 18656 37312

26–47 48–83 84–149 150–267 268–477 478–854 855–1527 1528–2733 2734–4891 4892–8752 >p98

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

26–47 46 69% 1.2s

48–83 1,061 87% 1.1s

84–149 10,517 93% 961ms

150–267 29,896 94% 1.0s

268–477 37,312 92% 1.2s

478–854 32,475 90% 1.4s

855–1527 24,321 83% 1.7s

1528–2733 14,849 67% 2.1s

2734–4891 13,045 73% 1.7s

4892–8752 8,933 77% 1.7s

>p98 3,519 74% 1.7s

Good Needs Improvement Poor Faded rows: under 100 sites

Lab paint timeline — lcp 556ms. p75 1.4s. p99 19.3s. Spearman with LCP r = +0.38. At the low end (26–47ms): LCP 1.2s. At the high end (>p98): LCP 1.7s. 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 TTFB separates passing sites from failing sites the most. 85% of sites at the low end pass the LCP. Past 2.4s, the typical site fails. At the top of the range only 44% pass.

Go fix it How we measured → Chrome DevTools network settings for CWV testing →