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
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
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
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.
Chrome field data from 94,910 sites, representing millions of real page loads. How we measured.