1
At a glance the headline numbers for Images per page
How many images the page renders and their over-the-wire weight.
22
image count
on the typical page
1.1 MB
image weight
on the typical page
2.8 MB
1 in 4 pages exceed this
image weight
94,910
sites measured
desktop field data
The typical page serves 22 images weighing 1.1 MB.
The State of Web Vitals · Q1 2026 · 94,910 sites · desktop field datacorewebvitals.io/state-of-cwv
2
Distribution & median CLS site count and median CLS at each level of images per page — n
0.00
0.04
0.08
0.11
0.15
0
10711
21422
0
1–2
3
4
5–7
8–12
13–19
20–32
33–52
53–85
86–139
>p98
Good (≤0.1)
Needs improvement
Poor (>0.25)
Site count
The State of Web Vitals · Q1 2026 · 94,910 sites · desktop field datacorewebvitals.io/state-of-cwv
3
Passing CLS by images per page — n which level passes the CLS most often
Images per page — nSitesPassing CLSCLS
0
1,836
81%
0.01
1–2
3,992
81%
0.01
3
2,172
77%
0.03
4
1,872
78%
0.02
5–7
6,129
83%
0.02
8–12
11,144
80%
0.02
13–19
15,864
80%
0.02
20–32
21,422
79%
0.03
33–52
15,876
76%
0.03
53–85
8,838
76%
0.04
86–139
3,935
75%
0.04
>p98
1,830
74%
0.05
Good
Needs Improvement
Poor
Faded rows: under 100 sites
Images per page — n 22. p75 39. p99 178.9. At the low end (0): CLS 0.01. At the high end (>p98): CLS 0.05. computed
The State of Web Vitals · Q1 2026 · 94,910 sites · desktop field datacorewebvitals.io/state-of-cwv
4
Distribution & median CLS site count and median CLS at each level of images per page — size
0.00
0.04
0.08
0.11
0.15
0
14829
29657
0
0.1–0.337
0.337–1.14
1.14–3.83
3.83–12.9
12.9–43.4
43.4–146
146–493
493–1662
1662–5600
5600–18871
>p98
Good (≤0.1)
Needs improvement
Poor (>0.25)
Site count
The State of Web Vitals · Q1 2026 · 94,910 sites · desktop field datacorewebvitals.io/state-of-cwv
5
Passing CLS by images per page — size which level passes the CLS most often
Images per page — sizeSitesPassing CLSCLS
0
2,319
80%
0.01
0.1–0.337
116
81%
0.02
0.337–1.14
164
76%
0.03
1.14–3.83
526
80%
0.02
3.83–12.9
1,403
77%
0.02
12.9–43.4
2,459
81%
0.02
43.4–146
5,417
81%
0.02
146–493
15,480
81%
0.02
493–1662
29,657
79%
0.03
1662–5600
25,970
76%
0.03
5600–18871
9,540
75%
0.04
>p98
1,852
72%
0.04
Good
Needs Improvement
Poor
Faded rows: under 100 sites
Images per page — size 1.1 MB. p75 2.8 MB. p99 26.8 MB. At the low end (0 KB): CLS 0.01. At the high end (>p98): CLS 0.04. computed
The State of Web Vitals · Q1 2026 · 94,910 sites · desktop field datacorewebvitals.io/state-of-cwv
6
Why this matters for the Core Web Vitals, and where to start fixing it
Image count and image weight are the bulk of most pages. Those bytes compete with the LCP image for bandwidth: the browser downloads gallery thumbnails while the hero is still streaming. More images also means more decode work, and decoding is not free on a cheap phone.
Fewer, smaller, later. Cut the decorative ones, right-size the rest, lazy-load below the fold. The format and loading splits in the explorer show where to start.
How do images affect the Core Web Vitals?
Passing LCP barely moves across the range: 83% at one end, 79% at the other. This signal does not separate passing sites from failing ones.
Chrome field data from 94,910 sites, representing millions of real page loads.
How we measured.