The State of Web Vitals

LCP image size

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

Field data PhoneDesktopAll Scope All sites Q2 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.

0.2 MP
file pixels
on the typical page
0.1 MP
displayed pixels
on the typical page
0.2 MP
1 in 4 pages exceed this
displayed pixels
74,337
sites measured
phone field data
The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv
2

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

0ms 63ms 125ms 188ms 250ms
200ms
0 30420 60840
0–0 1–1 2+
Good (≤200ms) Needs improvement Poor (>500ms) Site count
The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv
3

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

LCP image size — natural mpSitesPassing INPINP
0–0 60,840 91% 99ms
1–1 7,392 93% 97ms
2+ 6,105 93% 100ms
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 (0–0): INP 99ms. At the high end (2+): INP 100ms. computed

The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv
4

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

0ms 63ms 125ms 188ms 250ms
200ms
0 36874 73748
0–0 1+
Good (≤200ms) Needs improvement Poor (>500ms) Site count
The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv
5

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

LCP image size — rendered mpSitesPassing INPINP
0–0 73,748 92% 99ms
1+ 836 91% 103ms
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 (0–0): INP 99ms. At the high end (1+): INP 103ms. computed

The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv
6

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.

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 189,915 sites, representing millions of real page loads · How we measured
Live queries (5) — admin only
Query #1: 13.6 ms 
SELECT COUNT(*) AS count,
            quantile_disc(m.lcp.size.bytes, 0.10) AS p10,
            quantile_disc(m.lcp.size.bytes, 0.25) AS p25,
            quantile_disc(m.lcp.size.bytes, 0.50) AS p50,
            quantile_disc(m.lcp.size.bytes, 0.75) AS p75,
            quantile_disc(m.lcp.size.bytes, 0.90) AS p90,
            quantile_disc(m.lcp.size.bytes, 0.99) AS p99
            FROM sites WHERE m.lcp.size.bytes IS NOT NULL;
Query #2: 163.1 ms 
SELECT COUNT(*) AS count,
            quantile_disc(m.lcp.size.natural_mp, 0.10) AS p10,
            quantile_disc(m.lcp.size.natural_mp, 0.25) AS p25,
            quantile_disc(m.lcp.size.natural_mp, 0.50) AS p50,
            quantile_disc(m.lcp.size.natural_mp, 0.75) AS p75,
            quantile_disc(m.lcp.size.natural_mp, 0.90) AS p90,
            quantile_disc(m.lcp.size.natural_mp, 0.99) AS p99
            FROM sites WHERE m.lcp.size.natural_mp IS NOT NULL;
Query #3: 134.3 ms 
SELECT CASE WHEN m.lcp.size.natural_mp >= 0 AND m.lcp.size.natural_mp < 1 THEN 0 WHEN m.lcp.size.natural_mp >= 1 AND m.lcp.size.natural_mp < 2 THEN 1 WHEN m.lcp.size.natural_mp >= 2 THEN 2 END AS bucket_idx, COUNT(*) AS n,
            quantile_disc(crux."phone".inp, 0.5) AS median,
            COUNT(*) FILTER (WHERE crux."phone".inp IS NOT NULL AND crux."phone".inp <= 200) * 1.0 / NULLIF(COUNT(*) FILTER (WHERE crux."phone".inp IS NOT NULL), 0) AS good_pct
            FROM sites WHERE m.lcp.size.natural_mp IS NOT NULL GROUP BY bucket_idx;
Query #4: 147.0 ms 
SELECT COUNT(*) AS count,
            quantile_disc(m.lcp.size.rendered_mp, 0.10) AS p10,
            quantile_disc(m.lcp.size.rendered_mp, 0.25) AS p25,
            quantile_disc(m.lcp.size.rendered_mp, 0.50) AS p50,
            quantile_disc(m.lcp.size.rendered_mp, 0.75) AS p75,
            quantile_disc(m.lcp.size.rendered_mp, 0.90) AS p90,
            quantile_disc(m.lcp.size.rendered_mp, 0.99) AS p99
            FROM sites WHERE m.lcp.size.rendered_mp IS NOT NULL;
Query #5: 138.3 ms 
SELECT CASE WHEN m.lcp.size.rendered_mp >= 0 AND m.lcp.size.rendered_mp < 1 THEN 0 WHEN m.lcp.size.rendered_mp >= 1 THEN 1 END AS bucket_idx, COUNT(*) AS n,
            quantile_disc(crux."phone".inp, 0.5) AS median,
            COUNT(*) FILTER (WHERE crux."phone".inp IS NOT NULL AND crux."phone".inp <= 200) * 1.0 / NULLIF(COUNT(*) FILTER (WHERE crux."phone".inp IS NOT NULL), 0) AS good_pct
            FROM sites WHERE m.lcp.size.rendered_mp IS NOT NULL GROUP BY bucket_idx;
JSON file lookups (4)
20260625/meta.json 0.02 ms
20260625/types.json 0.55 ms
20260625/loaf-scripts.json 0.36 ms
20260625/menu.json 0.11 ms