The State of Web Vitals

Largest layout shift score and the Core Web Vitals

Among sites with non-zero lab CLS, 35.7% (49,951) keep their largest single shift under 0.01 (94% good field CLS), whereas the 15.2% suffering a single jump over 0.25 drop to 74% good field CLS.

Field data PhoneDesktopAll Scope All sites October 2026 edition · Phone field outcomes

35.7% of sites use a largest shift under 0.01 largest single layout shift score, and 94% of those sites have a good CLS, against 89% of all sites.

The State of Web Vitals · October 2026 · 210,902 crawled sites · 126,761 with phone field data · 139,880 sites with largest single layout shift scoreBy Arjen Karel · corewebvitals.io/state-of-cwv
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CLS pass rate

Sites with a largest shift under 0.01 largest single layout shift score have a good CLS most often: 94%, against 89% of all sites. Sites with a largest shift over 0.25 largest shift have it least often, at 74%.

SitesGood, needs improvement, poor CLSMedian
All sites126,76189%0.00
Under 0.01 (Imperceptible) 35.7%30,88294%0.00
0.01 to 0.10 (Within Good budget) 33.8%29,36790%0.00
0.10 to 0.25 (Needs Improvement) 15.3%13,51778%0.00
Over 0.25 (Poor in one jump) 15.2%13,77674%0.01
GoodNeeds improvementPoorSites: with Chrome field data
The State of Web Vitals · October 2026 · 210,902 crawled sites · 126,761 with phone field data · 139,880 sites with largest single layout shift scoreBy Arjen Karel · corewebvitals.io/state-of-cwv
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Largest single layout shift score usage

A largest shift under 0.01 is the most used: 35.7% of sites.

Under 0.01 (Imperceptible) 35.7% 0.01 to 0.10 (Within Good budget) 33.8% 0.10 to 0.25 (Needs Improvement) 15.3% Over 0.25 (Poor in one jump) 15.2%
Under 0.01 (Imperceptible) 35.7% 0.01 to 0.10 (Within Good budget) 33.8% 0.10 to 0.25 (Needs Improvement) 15.3% Over 0.25 (Poor in one jump) 15.2%
The State of Web Vitals · October 2026 · 210,902 crawled sites · 126,761 with phone field data · 139,880 sites with largest single layout shift scoreBy Arjen Karel · corewebvitals.io/state-of-cwv
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Understanding largest single layout shift score

When a single layout jump blows the entire 0.10 CLS budget

Google's Good CLS threshold is 0.10. Across 49,951 shifting sites (35.7%) whose largest single shift stays below 0.01, 94% pass field CLS, and across 47,232 sites (33.8%) at 0.01 to 0.10, 90% pass. Once a single jump lands between 0.10 and 0.25 (15.3%), good field CLS drops to 78%, and when a single shift exceeds 0.25 (15.2%, 21,254 sites), only 74% pass field CLS.

Cap your largest single layout shift below 0.01 by reserving exact aspect-ratio boxes for hero images and rendering top promo or consent banners in fixed or server-allocated slots. Across all shifting sites, 35.7% stay under 0.01 (94% good CLS) and 15.2% exceed 0.25 (74% good CLS).

Go fix it CLS from images and media → Fix layout shift from auto-sizing images → Keep text visible during font load →
The State of Web Vitals · October 2026 · 210,902 crawled sites · 126,761 with phone field data · 139,880 sites with largest single layout shift scoreBy Arjen Karel · corewebvitals.io/state-of-cwv
Platform & Framework Takeaways

How largest single layout shift score plays out per platform

What the field data shows when you isolate a single CMS or framework.

WordPress 48,578 sites
95% vs 76% good CLS (<0.01 vs >0.25 largest shift)

Shifting WordPress sites with a largest shift over 0.25 (12.5%) pass field CLS at 76% vs 95% under 0.01 (19 points apart).

Across 48,578 WordPress sites with non-zero lab CLS, 37.9% have a largest shift under 0.01 (95% good CLS), 35.3% sit at 0.01 to 0.10 (91%), 14.3% sit at 0.10 to 0.25 (77%), and 12.5% exceed 0.25 (76% good CLS).

Read the WordPress largest shift breakdown →
Shopify 5,684 stores
97% vs 81% good CLS (<0.01 vs >0.25 largest shift)

Shifting Shopify stores with a largest shift over 0.25 (12.2%) pass field CLS at 81% vs 97% under 0.01.

Across 5,684 shifting Shopify storefronts, 37.3% have a largest shift under 0.01 (97% good CLS), 37.6% sit at 0.01 to 0.10 (94%), and 12.2% exceed 0.25 (81% good CLS).

Read the Shopify largest shift breakdown →
React & Next.js 4,093 sites
95% vs 68% good CLS (<0.01 vs >0.25 largest shift)

Shifting React & Next.js sites with a largest shift over 0.25 (14.8%) pass field CLS at 68% vs 95% under 0.01 (27 points apart).

Across 4,093 shifting React sites, 36.7% have a largest shift under 0.01 (95% good CLS) and 14.8% exceed 0.25 (68% good CLS).

Related signals Shift direction → What shifted → Layout shift count → Shift concentration → By Arjen Karel · 210,902 crawled sites (126,761 with phone Chrome field data, 139,880 sites with largest single layout shift score, October 2026) · How we measured