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
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
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
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
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, 82% of sites pass the INP. Where it is high, 94% do. The rise is gradual.
Chrome field data from 94,910 sites, representing millions of real page loads. How we measured.