The State of Web Vitals

LCP image size

The LCP element: transfer size and natural / rendered pixel size.

Field data PhoneDesktopAll Scope All sites October 2026 edition · Phone field outcomes
Metric LCP INP CLS
1

At a glance the headline numbers for LCP image size

The LCP element: transfer size and natural / rendered pixel size.

101.4 KB
transfer size
on the typical page
0.2 MP
file pixels
on the typical page
0.1 MP
displayed pixels
on the typical page
111,007
sites measured
phone field data

The typical LCP image ships 101.4 KB over the wire. It carries 0.2 MP for 0.1 MP actually shown.

The State of Web Vitals · October 2026 · 195,336 sites · phone field datacorewebvitals.io/state-of-cwv
2

Distribution & median CLS site count and median CLS at each level of LCP image size — bytes

0.00 0.04 0.08 0.11 0.15
0.1
0 12931 25862
300–737 738–1811 1812–4451 4452–10937 10938–26874 26875–66036 66037–162265 162266–398721 398722–979744 979745–2407443 >p98
Good (≤0.1) Needs improvement Poor (>0.25) Site count
The State of Web Vitals · October 2026 · 195,336 sites · phone field datacorewebvitals.io/state-of-cwv
3

Passing CLS by LCP image size — bytes which level passes the CLS most often

LCP image size — bytesSitesPassing CLSCLS
300–737 1,137 88% 0.00
738–1811 676 88% 0.00
1812–4451 1,473 88% 0.00
4452–10937 4,058 89% 0.00
10938–26874 11,914 91% 0.00
26875–66036 22,860 91% 0.00
66037–162265 25,862 90% 0.00
162266–398721 21,906 89% 0.00
398722–979744 13,842 90% 0.00
979745–2407443 5,058 89% 0.00
>p98 2,221 89% 0.00
Good Needs Improvement Poor Faded rows: under 100 sites

LCP image size — bytes 101.4 KB. p75 290.2 KB. p99 3.4 MB. At the low end (300–737): CLS 0.00. At the high end (>p98): CLS 0.00. computed

The State of Web Vitals · October 2026 · 195,336 sites · phone field datacorewebvitals.io/state-of-cwv
4

Distribution & median CLS site count and median CLS at each level of LCP image size — natural mp

0.00 0.04 0.08 0.11 0.15
0.1
0 9922 19843
0 0.001–0.002 0.002–0.005 0.005–0.012 0.012–0.029 0.029–0.066 0.066–0.153 0.153–0.354 0.354–0.819 0.819–1.89 1.89–4.38 >p98
Good (≤0.1) Needs improvement Poor (>0.25) Site count
The State of Web Vitals · October 2026 · 195,336 sites · phone field datacorewebvitals.io/state-of-cwv
5

Passing CLS by LCP image size — natural mp which level passes the CLS most often

LCP image size — natural mpSitesPassing CLSCLS
0 153 93% 0.00
0.001–0.002 34 91% 0.00
0.002–0.005 173 79% 0.00
0.005–0.012 436 71% 0.00
0.012–0.029 1,903 88% 0.00
0.029–0.066 5,623 91% 0.00
0.066–0.153 19,843 90% 0.00
0.153–0.354 19,420 90% 0.00
0.354–0.819 12,668 86% 0.00
0.819–1.89 9,521 86% 0.00
1.89–4.38 5,175 87% 0.00
>p98 1,529 86% 0.00
Good Needs Improvement Poor Faded rows: under 100 sites

LCP image size — natural mp 0.2 MP. p75 0.7 MP. p99 7.7 MP. At the low end (0): CLS 0.00. At the high end (>p98): CLS 0.00. computed

The State of Web Vitals · October 2026 · 195,336 sites · phone field datacorewebvitals.io/state-of-cwv
6

Distribution & median CLS site count and median CLS at each level of LCP image size — rendered mp

0.00 0.04 0.08 0.11 0.15
0.1
0 13327 26653
0 0.001–0.002 0.002–0.004 0.004–0.007 0.007–0.014 0.014–0.026 0.026–0.051 0.051–0.097 0.097–0.187 0.187–0.36 0.36–0.693 >p98
Good (≤0.1) Needs improvement Poor (>0.25) Site count
The State of Web Vitals · October 2026 · 195,336 sites · phone field datacorewebvitals.io/state-of-cwv
7

Passing CLS by LCP image size — rendered mp which level passes the CLS most often

LCP image size — rendered mpSitesPassing CLSCLS
0 14 92% 0.00
0.001–0.002 24 86% 0.00
0.002–0.004 200 84% 0.00
0.004–0.007 786 82% 0.00
0.007–0.014 1,039 87% 0.00
0.014–0.026 2,335 89% 0.00
0.026–0.051 5,156 90% 0.00
0.051–0.097 20,772 88% 0.00
0.097–0.187 26,653 88% 0.00
0.187–0.36 15,992 90% 0.00
0.36–0.693 2,220 90% 0.00
>p98 1,538 86% 0.00
Good Needs Improvement Poor Faded rows: under 100 sites

LCP image size — rendered mp 0.1 MP. p75 0.2 MP. p99 1.0 MP. At the low end (0): CLS 0.00. At the high end (>p98): CLS 0.00. computed

The State of Web Vitals · October 2026 · 195,336 sites · phone field datacorewebvitals.io/state-of-cwv
8

Why this matters for the Core Web Vitals, and where to start fixing it

Three numbers describe the LCP image: the bytes over the wire, the pixels in the file, and the pixels actually shown. The gap between the last two is pure waste. An image with far more natural pixels than rendered pixels shipped resolution nobody saw, and the extra bytes stretched the load time.

Right-size first, then compress, then pick the format. Resizing the image to what is displayed saves more than recompressing a wrong-sized original ever will.

How does the weight of the LCP image affect the LCP?

LCP image size correlates with the LCP. Displayed pixels separates passing sites from failing sites the most. Where the displayed pixels is low, 70% of sites pass the LCP. Where it is high, 83% do. The rise is gradual. The mechanism says more displayed pixels should cost LCP, but the fleet shows the opposite: bigger, better-built sites carry more of it and still pass. The cost is real per site; across sites it is drowned out by who builds them.

Go fix it Optimize the LCP image → LCP: resource load duration → Optimize images for Core Web Vitals →
Related signals LCP loading attribute → LCP element type → LCP responsive markup → LCP discovery → Chrome field data from 195,336 sites, representing millions of real page loads · How we measured