Largest layout shift score and the Core Web Vitals
Among sites with non-zero lab CLS, 35.7% (50,332) 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 69% good field CLS.
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 88% of all sites.
CLS pass rate
Sites with a largest shift under 0.01 largest single layout shift score have a good CLS most often: 94%, against 88% of all sites. Sites with a largest shift over 0.25 largest shift have it least often, at 69%.
Largest single layout shift score usage
A largest shift under 0.01 is the most used: 35.7% of sites.
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 50,332 shifting sites (35.7%) whose largest single shift stays below 0.01, 94% pass field CLS, and across 47,557 sites (33.8%) at 0.01 to 0.10, 89% pass. Once a single jump lands between 0.10 and 0.25 (15.3%), good field CLS drops to 76%, and when a single shift exceeds 0.25 (15.2%, 21,393 sites), only 69% 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 (69% good CLS).
How largest single layout shift score plays out per platform
What the field data shows when you isolate a single CMS or framework.
WordPress 48,898 sites Shifting WordPress sites with a largest shift over 0.25 (12.5%) pass field CLS at 68% vs 95% under 0.01 (27 points apart).
Across 48,898 WordPress sites with non-zero lab CLS, 37.8% 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 (76%), and 12.5% exceed 0.25 (68% good CLS).
Shopify 5,724 stores Shifting Shopify stores with a largest shift over 0.25 (12.3%) pass field CLS at 79% vs 97% under 0.01.
Across 5,724 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 12.3% exceed 0.25 (79% good CLS).
React & Next.js 4,160 sites Shifting React & Next.js sites with a largest shift over 0.25 (14.7%) pass field CLS at 65% vs 94% under 0.01 (29 points apart).
Across 4,160 shifting React sites, 37.0% have a largest shift under 0.01 (94% good CLS) and 14.7% exceed 0.25 (65% good CLS).
Wix 1,266 sites 86% of shifting Wix pages have a largest shift at or below 0.10 (98% good CLS under 0.01).
Across the 1,266 Wix sites recording non-zero lab CLS, 52.1% sit under 0.01 (98% good CLS), 34.0% sit at 0.01 to 0.10 (97% good CLS), and 9.4% exceed 0.25 (90%).
By Arjen Karel · 212,308 crawled sites (197,524 with all devices Chrome field data, 140,858 sites with largest single layout shift score, October 2026). How we measured.