In the lab, the typical site paints its main content after 559ms

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.

120ms

lab TTFB

on the typical page

367ms

lab FCP

on the typical page

559ms

lab LCP

on the typical page

94,841

sites measured

phone field data

In the lab, the typical site paints its main content after 559ms.

The State of Web Vitals · Q1 2026 · 94,910 sites · phone field datacorewebvitals.io/state-of-cwv

2

Distribution & median INP site count and median INP at each level of lab paint timeline — ttfb

0ms 63ms 125ms 188ms 250ms

200ms

0 10957 21914

0 1–2 3–5 6–10 11–23 24–50 51–108 109–236 237–516 517–1126 1127–2458 >p98

Good (≤200ms) Needs improvement Poor (>500ms) Site count

The State of Web Vitals · Q1 2026 · 94,910 sites · phone field datacorewebvitals.io/state-of-cwv

3

Passing INP by lab paint timeline — ttfb which level passes the INP most often

Lab paint timeline — ttfbSitesPassing INPINP

0 51 93% 105ms

1–2 106 91% 103ms

3–5 66 100% 104ms

6–10 37 95% 97ms

11–23 5,364 88% 103ms

24–50 21,914 90% 97ms

51–108 17,504 91% 99ms

109–236 15,564 92% 98ms

237–516 14,706 94% 97ms

517–1126 11,877 95% 99ms

1127–2458 5,757 94% 101ms

>p98 1,895 92% 103ms

Good Needs Improvement Poor Faded rows: under 100 sites

Lab paint timeline — ttfb 120ms. p75 413ms. p99 3.5s. At the low end (0ms): INP 105ms. At the high end (>p98): INP 103ms. computed

The State of Web Vitals · Q1 2026 · 94,910 sites · phone field datacorewebvitals.io/state-of-cwv

4

Distribution & median INP site count and median INP at each level of lab paint timeline — fcp

0ms 63ms 125ms 188ms 250ms

200ms

0 9753 19505

55–85 86–131 132–203 204–313 314–483 484–746 747–1153 1154–1780 1781–2750 2751–4247 >p98

Good (≤200ms) Needs improvement Poor (>500ms) Site count

The State of Web Vitals · Q1 2026 · 94,910 sites · phone field datacorewebvitals.io/state-of-cwv

5

Passing INP by lab paint timeline — fcp which level passes the INP most often

Lab paint timeline — fcpSitesPassing INPINP

55–85 506 75% 111ms

86–131 5,432 87% 93ms

132–203 15,117 92% 94ms

204–313 19,505 92% 97ms

314–483 16,208 92% 100ms

484–746 13,064 94% 101ms

747–1153 9,933 93% 101ms

1154–1780 6,830 94% 102ms

1781–2750 3,764 92% 103ms

2751–4247 1,763 93% 102ms

>p98 1,880 89% 104ms

Good Needs Improvement Poor Faded rows: under 100 sites

Lab paint timeline — fcp 367ms. p75 765ms. p99 5.7s. At the low end (55–85ms): INP 111ms. At the high end (>p98): INP 104ms. computed

The State of Web Vitals · Q1 2026 · 94,910 sites · phone field datacorewebvitals.io/state-of-cwv

6

Distribution & median INP site count and median INP at each level of lab paint timeline — lcp

0ms 63ms 125ms 188ms 250ms

200ms

0 9623 19245

26–46 47–81 82–144 145–255 256–450 451–796 797–1409 1410–2491 2492–4407 4408–7795 >p98

Good (≤200ms) Needs improvement Poor (>500ms) Site count

The State of Web Vitals · Q1 2026 · 94,910 sites · phone field datacorewebvitals.io/state-of-cwv

7

Passing INP by lab paint timeline — lcp which level passes the INP most often

Lab paint timeline — lcpSitesPassing INPINP

47–81 328 81% 102ms

82–144 4,472 84% 96ms

145–255 14,331 91% 93ms

256–450 19,245 92% 96ms

451–796 16,802 93% 98ms

797–1409 13,205 93% 102ms

1410–2491 8,327 93% 103ms

2492–4407 5,971 93% 101ms

4408–7795 5,639 92% 104ms

>p98 1,803 89% 109ms

Good Needs Improvement Poor Faded rows: under 100 sites

Lab paint timeline — lcp 559ms. p75 1.4s. p99 10.3s. At the low end (47–81ms): INP 102ms. At the high end (>p98): INP 109ms. computed

The State of Web Vitals · Q1 2026 · 94,910 sites · phone 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 INP. Lab FCP separates passing sites from failing sites the most. Where the lab FCP is low, 75% of sites pass the INP. Where it is high, 89% do. The rise is gradual.

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