1
At a glance the headline numbers for Scheduling impact
Performance impact by scheduling provider.
1
Providers ranked
After min-sites filter
823
Sites in sample
Combined across all items
2.3s
Best LCP (p75)
Calendly
The State of Web Vitals · Q1 2026 · 94,910 sites · phone field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by LCP at p75, fastest first
| # | Provider | LCP p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Calendly | 2.3s | 79.2% | 823 |
The State of Web Vitals · Q1 2026 · 94,910 sites · phone field datacorewebvitals.io/state-of-cwv
3
Passing LCP per provider which group passes the LCP most often
ProviderSitesPassing LCPp75
Cal.com 0% 5 1.1s
Acuity Scheduling 0% 6 1.5s
Calendly 0.9% 823 2.3s
Good Needs Improvement Poor Sorted best-passing first · median colored by its own rating · pass = good LCP (2.5s at p75) · one value per site
The State of Web Vitals · Q1 2026 · 94,910 sites · phone field datacorewebvitals.io/state-of-cwv
4
All five vitals at once the whole category without toggling - cell is the pass rate, small number the p75
LCP
INP
CLS
FCP
TTFB
Calendly 0.9%
792.3s
96115ms
900.02
751.8s
551.1s
Acuity Scheduling 0%
1001.5s
67191ms
750.13
1001.2s
100624ms
Cal.com 0%
1001.1s
100192ms
1000.00
100918ms
100341ms
60%95%+ passing Cell: pass rate, small number = p75 · faded rows: under 100 sites
One row per provider, one column per vital - the cell is the share of sites passing, the small number the p75. No toggling needed to see where the category actually differs.
The State of Web Vitals · Q1 2026 · 94,910 sites · phone field datacorewebvitals.io/state-of-cwv
Related signals Reviews (8) → Customer data platforms (5) → Analytics (20) → Consent platforms (16) → Chrome field data from 94,910 sites, representing millions of real page loads · How we measured
Chrome field data from 94,910 sites, representing millions of real page loads. How we measured.