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

all-device field data

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

The State of Web Vitals · Q1 2026 · 94,910 sites · all devices 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 · all devices 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 95% 96ms

1–2 106 94% 89ms

3–5 66 100% 92ms

6–10 37 97% 87ms

11–23 5,364 92% 87ms

24–50 21,914 94% 85ms

51–108 17,504 94% 86ms

109–236 15,564 95% 86ms

237–516 14,706 96% 86ms

517–1126 11,877 97% 88ms

1127–2458 5,757 96% 88ms

>p98 1,895 95% 90ms

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 96ms. At the high end (>p98): INP 90ms. computed

The State of Web Vitals · Q1 2026 · 94,910 sites · all devices 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 · all devices 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 82% 90ms

86–131 5,432 90% 79ms

132–203 15,117 94% 83ms

204–313 19,505 95% 85ms

314–483 16,208 95% 87ms

484–746 13,064 96% 87ms

747–1153 9,933 95% 89ms

1154–1780 6,830 96% 89ms

1781–2750 3,764 95% 90ms

2751–4247 1,763 96% 88ms

>p98 1,880 94% 90ms

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 90ms. At the high end (>p98): INP 90ms. computed

The State of Web Vitals · Q1 2026 · 94,910 sites · all devices 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 · all devices 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

26–46 14 100% 88ms

47–81 328 88% 81ms

82–144 4,472 89% 82ms

145–255 14,331 94% 81ms

256–450 19,245 95% 84ms

451–796 16,802 95% 87ms

797–1409 13,205 96% 89ms

1410–2491 8,327 96% 89ms

2492–4407 5,971 96% 88ms

4408–7795 5,639 95% 92ms

>p98 1,803 93% 96ms

Good Needs Improvement Poor Faded rows: under 100 sites

Lab paint timeline — lcp 559ms. p75 1.4s. p99 10.3s. At the low end (26–46ms): INP 88ms. At the high end (>p98): INP 96ms. computed

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

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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, 82% of sites pass the INP. Where it is high, 94% do. The rise is gradual.

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