# Core Web Vitals Statistics 2026: Pass Rates by Metric, Device, CMS and Country

Updated 2026-11-10. Checked by StatisticsGlobal editorial team. Chrome UX Report field data via HTTP Archive's monthly report and Web Almanac, Google's Web Vitals guidance and case study, and a Deloitte study, 3 publishers.
Canonical: https://statisticsglobal.org/core-web-vitals-statistics/

52.8% of mobile websites and 60.8% of desktop websites had good Core Web Vitals in September 2026, according to HTTP Archive. That means good Largest Contentful Paint, Interaction to Next Paint and Cumulative Layout Shift together. The mobile pass rate is 2.3 points higher than a year earlier and 2.3 times the September 2020 level. Loading speed is the main barrier. 34.4% of mobile sites did not have a good LCP. Pass rates differ widely by platform and country, from 80.9% of mobile Wix sites to 48.3% of mobile WordPress sites.

## Key statistics

- 52.8% of mobile websites had good Core Web Vitals in September 2026, according to HTTP Archive.
- 60.8% of desktop websites had good Core Web Vitals in September 2026, according to HTTP Archive.
- Largest Contentful Paint was the metric mobile websites failed most often in September 2026, at 34.4%, calculated by StatisticsGlobal from HTTP Archive data.
- The share of mobile websites with good Core Web Vitals rose 2.3 percentage points between September 2025 and September 2026, calculated by StatisticsGlobal from HTTP Archive data.
- Mobile Wix websites passed Core Web Vitals 32.6 percentage points more often than mobile WordPress websites in September 2026, calculated by StatisticsGlobal from HTTP Archive data.

## Core Web Vitals pass rate

A website passes Core Web Vitals when at least 75% of real Chrome page loads are good on all three metrics. HTTP Archive publishes the share of websites that pass every month. Its Web Almanac adds a yearly deep dive on July data.

Just over half of mobile websites now pass. Desktop does better, at 60.8% in September 2026, a lead of 8.0 points. Phones are slower and often run on weaker networks, so the same page scores worse on mobile.

Popular sites do not always do better. The top 1,000 mobile sites passed at 51% in 2025, above average. Sites ranked in the top 100,000 did worst, at 37%. Home pages also trail inner pages, at 45% against 56% on mobile.

The two HTTP Archive sources do not match exactly. For July 2025, the monthly Technology Report shows 50.0% of mobile sites passing, while the Web Almanac reports 48%. Both draw on the same crawl but use different queries. We show each figure with its own source.

- 52.8% of mobile websites had good Core Web Vitals in September 2026, according to HTTP Archive. Source: HTTP Archive, Core Web Vitals Technology Report (API), all technologies (monthly series to September 2026, accessed 10 November 2026) https://cdn.httparchive.org/v1/cwv?technology=ALL&geo=ALL&rank=ALL
- 60.8% of desktop websites had good Core Web Vitals in September 2026, according to HTTP Archive. Source: HTTP Archive, Core Web Vitals Technology Report (API), all technologies (monthly series to September 2026, accessed 10 November 2026) https://cdn.httparchive.org/v1/cwv?technology=ALL&geo=ALL&rank=ALL
- Desktop websites led mobile on good Core Web Vitals by 8.0 percentage points in September 2026, calculated by StatisticsGlobal from HTTP Archive data. Source: HTTP Archive, Core Web Vitals Technology Report (API), all technologies (monthly series to September 2026, accessed 10 November 2026) https://cdn.httparchive.org/v1/cwv?technology=ALL&geo=ALL&rank=ALL
- HTTP Archive had Core Web Vitals field data for 8,569,446 mobile websites in September 2026. Source: HTTP Archive, Core Web Vitals Technology Report (API), all technologies (monthly series to September 2026, accessed 10 November 2026) https://cdn.httparchive.org/v1/cwv?technology=ALL&geo=ALL&rank=ALL
- Good Core Web Vitals were reached by 48% of mobile websites in 2025, up from 44% in 2024, according to HTTP Archive. Source: HTTP Archive, Web Almanac 2025, Chapter 11: Performance (15 January 2026 (updated 5 May 2026), accessed 7 November 2026) https://almanac.httparchive.org/en/2025/performance
- Good Core Web Vitals were reached by 56% of desktop websites in 2025, up from 55% in 2024, according to HTTP Archive. Source: HTTP Archive, Web Almanac 2025, Chapter 11: Performance (15 January 2026 (updated 5 May 2026), accessed 7 November 2026) https://almanac.httparchive.org/en/2025/performance
- HTTP Archive's live dashboard showed a mobile pass rate 2.0 points above its Web Almanac figure for July 2025, calculated by StatisticsGlobal from HTTP Archive data. Source: HTTP Archive, Core Web Vitals Technology Report (API), all technologies (monthly series to September 2026, accessed 10 November 2026) https://cdn.httparchive.org/v1/cwv?technology=ALL&geo=ALL&rank=ALL
- 51% of the 1,000 most popular mobile websites had good Core Web Vitals in 2025, according to HTTP Archive. Source: HTTP Archive, Web Almanac 2025, Chapter 11: Performance (15 January 2026 (updated 5 May 2026), accessed 10 November 2026) https://almanac.httparchive.org/en/2025/performance
- Mobile websites ranked in the top 100,000 had the lowest Core Web Vitals pass rate of any rank group in 2025, at 37%, according to HTTP Archive. Source: HTTP Archive, Web Almanac 2025, Chapter 11: Performance (15 January 2026 (updated 5 May 2026), accessed 10 November 2026) https://almanac.httparchive.org/en/2025/performance
- Good Core Web Vitals were reached by 45% of mobile home pages and 56% of mobile secondary pages in 2025, according to HTTP Archive. Source: HTTP Archive, Web Almanac 2025, Chapter 11: Performance (15 January 2026 (updated 5 May 2026), accessed 10 November 2026) https://almanac.httparchive.org/en/2025/performance

Table: Share of mobile websites with good Core Web Vitals, by popularity rank group, 2025

| Rank group | Good Core Web Vitals, mobile |
|---|---|
| Top 1,000 | 51% |
| Top 10,000 | 42% |
| Top 100,000 | 37% |
| Top 1,000,000 | 42% |
| Top 10,000,000 | 49% |
| All websites | 48% |

Source: HTTP Archive, Web Almanac 2025, Performance chapter. Chrome UX Report data for the July 2025 crawl. Desktop stayed between 55% and 57% in every group.

## LCP, INP and CLS statistics

Each Core Web Vital has a good threshold set by Google. The table compares those thresholds with the share of websites that met them in September 2026.

Largest Contentful Paint is the hardest test. 34.4% of mobile sites failed it in September 2026, against 20.6% for INP and 16.6% for CLS. Images are often involved. The LCP element was an image on 76% of mobile pages in 2025, and about 16% of pages still lazy-loaded it.

INP shows the biggest device gap. Almost every desktop site passes, at 97.6%, but only 79.4% of mobile sites do. Phones have less processing power for JavaScript. Median mobile Total Blocking Time rose 58% in 2025, so pages are doing more work on the main thread.

CLS is the one metric where mobile beats desktop, by 8.8 points. Images without set dimensions are one common cause of layout shifts. 62% of mobile pages still left out dimensions on at least one image in 2025.

- Good Largest Contentful Paint was reached by 65.6% of mobile websites and 79.0% of desktop websites in September 2026, according to HTTP Archive. Source: HTTP Archive, Core Web Vitals Technology Report (API), all technologies (monthly series to September 2026, accessed 10 November 2026) https://cdn.httparchive.org/v1/cwv?technology=ALL&geo=ALL&rank=ALL
- Good Interaction to Next Paint was reached by 79.4% of mobile websites and 97.6% of desktop websites in September 2026, according to HTTP Archive. Source: HTTP Archive, Core Web Vitals Technology Report (API), all technologies (monthly series to September 2026, accessed 10 November 2026) https://cdn.httparchive.org/v1/cwv?technology=ALL&geo=ALL&rank=ALL
- Good Cumulative Layout Shift was reached by 83.4% of mobile websites and 74.6% of desktop websites in September 2026, according to HTTP Archive. Source: HTTP Archive, Core Web Vitals Technology Report (API), all technologies (monthly series to September 2026, accessed 10 November 2026) https://cdn.httparchive.org/v1/cwv?technology=ALL&geo=ALL&rank=ALL
- Largest Contentful Paint was the metric mobile websites failed most often in September 2026, at 34.4%, calculated by StatisticsGlobal from HTTP Archive data. Source: HTTP Archive, Core Web Vitals Technology Report (API), all technologies (monthly series to September 2026, accessed 10 November 2026) https://cdn.httparchive.org/v1/cwv?technology=ALL&geo=ALL&rank=ALL
- Mobile websites beat desktop on good Cumulative Layout Shift by 8.8 percentage points in September 2026, calculated by StatisticsGlobal from HTTP Archive data. Source: HTTP Archive, Core Web Vitals Technology Report (API), all technologies (monthly series to September 2026, accessed 10 November 2026) https://cdn.httparchive.org/v1/cwv?technology=ALL&geo=ALL&rank=ALL
- Good Time to First Byte was reached by 45.9% of mobile websites and 58.2% of desktop websites in September 2026, according to HTTP Archive. Source: HTTP Archive, Core Web Vitals Technology Report (API), all technologies (monthly series to September 2026, accessed 10 November 2026) https://cdn.httparchive.org/v1/cwv?technology=ALL&geo=ALL&rank=ALL
- Google rates a Largest Contentful Paint of 2.5 seconds or less as good, in Web Vitals guidance last updated in 2024. Source: Google, Web Vitals (4 May 2020 (updated 31 October 2024), accessed 10 November 2026) https://web.dev/articles/vitals
- Google rates an Interaction to Next Paint of 200 milliseconds or less as good, in Web Vitals guidance last updated in 2024. Source: Google, Web Vitals (4 May 2020 (updated 31 October 2024), accessed 10 November 2026) https://web.dev/articles/vitals
- Google rates a Cumulative Layout Shift of 0.1 or less as good, in Web Vitals guidance last updated in 2024. Source: Google, Web Vitals (4 May 2020 (updated 31 October 2024), accessed 10 November 2026) https://web.dev/articles/vitals
- A good Largest Contentful Paint was reached by 62% of mobile pages in 2025, against 74% of desktop pages, according to HTTP Archive. Source: HTTP Archive, Web Almanac 2025, Chapter 11: Performance (15 January 2026 (updated 5 May 2026), accessed 7 November 2026) https://almanac.httparchive.org/en/2025/performance
- A good Interaction to Next Paint was reached by 77% of mobile websites in 2025, against 97% on desktop, according to HTTP Archive. Source: HTTP Archive, Web Almanac 2025, Chapter 11: Performance (15 January 2026 (updated 5 May 2026), accessed 7 November 2026) https://almanac.httparchive.org/en/2025/performance
- The largest element on screen was an image on 76% of mobile pages and 85.3% of desktop pages in 2025, according to HTTP Archive. Source: HTTP Archive, Web Almanac 2025, Chapter 11: Performance (15 January 2026 (updated 5 May 2026), accessed 7 November 2026) https://almanac.httparchive.org/en/2025/performance
- About 16% of web pages lazy-loaded their largest image in 2025, delaying the main content, according to HTTP Archive. Source: HTTP Archive, Web Almanac 2025, Chapter 11: Performance (15 January 2026 (updated 5 May 2026), accessed 7 November 2026) https://almanac.httparchive.org/en/2025/performance
- Good mobile Interaction to Next Paint among the top 1,000 websites rose from 53% in 2024 to 63% in 2025, according to HTTP Archive. Source: HTTP Archive, Web Almanac 2025, Chapter 11: Performance (15 January 2026 (updated 5 May 2026), accessed 10 November 2026) https://almanac.httparchive.org/en/2025/performance
- Median mobile Total Blocking Time rose 58% to 1,916 milliseconds in 2025, according to HTTP Archive. Source: HTTP Archive, Web Almanac 2025, Chapter 11: Performance (15 January 2026 (updated 5 May 2026), accessed 10 November 2026) https://almanac.httparchive.org/en/2025/performance
- 62% of mobile pages left out dimensions on at least one image in 2025, down from 66% in 2024, according to HTTP Archive. Source: HTTP Archive, Web Almanac 2025, Chapter 11: Performance (15 January 2026 (updated 5 May 2026), accessed 10 November 2026) https://almanac.httparchive.org/en/2025/performance

Table: Core Web Vitals thresholds and share of websites rated good, September 2026

| Metric | Good threshold (75th percentile) | Good, mobile | Good, desktop |
|---|---|---|---|
| Largest Contentful Paint (LCP) | 2.5 seconds or less | 65.6% | 79.0% |
| Interaction to Next Paint (INP) | 200 milliseconds or less | 79.4% | 97.6% |
| Cumulative Layout Shift (CLS) | 0.1 or less | 83.4% | 74.6% |
| All three (Core Web Vitals) | All of the above | 52.8% | 60.8% |

Sources: thresholds from Google, Web Vitals (web.dev, updated 31 October 2024). Shares from HTTP Archive Core Web Vitals Technology Report, September 2026.

## Core Web Vitals by country, mobile and desktop

The Chrome UX Report also publishes data for users in each country. The same website can pass for users in one country and fail in another, because devices and networks differ.

Users in Japan get the best mobile experience among the 15 largest countries, with 71.4% of sites passing. Users in Indonesia get the worst, at 29.4%, a gap of 42.0 points. India, Brazil and Mexico are also below 41%. Devices and networks are the likely reason, though the data itself does not show causes.

The desktop gap between countries is much smaller. Desktop pass rates range from 50.9% in India to 76.9% in Japan. In the US and Canada, mobile and desktop are almost level. In India the desktop rate is 19.3 points higher than mobile.

- 63.3% of mobile websites had good Core Web Vitals for users in the United States in September 2026, according to HTTP Archive. Source: HTTP Archive, Core Web Vitals Technology Report (API), geo breakdown (September 2026 data, accessed 10 November 2026) https://cdn.httparchive.org/v1/geo-breakdown?technology=ALL&rank=ALL&start=2026-09-01&end=2026-09-01
- 67.6% of mobile websites had good Core Web Vitals for users in the United Kingdom in September 2026, according to HTTP Archive. Source: HTTP Archive, Core Web Vitals Technology Report (API), geo breakdown (September 2026 data, accessed 10 November 2026) https://cdn.httparchive.org/v1/geo-breakdown?technology=ALL&rank=ALL&start=2026-09-01&end=2026-09-01
- 71.4% of mobile websites had good Core Web Vitals for users in Japan in September 2026, according to HTTP Archive. Source: HTTP Archive, Core Web Vitals Technology Report (API), geo breakdown (September 2026 data, accessed 10 November 2026) https://cdn.httparchive.org/v1/geo-breakdown?technology=ALL&rank=ALL&start=2026-09-01&end=2026-09-01
- 31.6% of mobile websites had good Core Web Vitals for users in India in September 2026, according to HTTP Archive. Source: HTTP Archive, Core Web Vitals Technology Report (API), geo breakdown (September 2026 data, accessed 10 November 2026) https://cdn.httparchive.org/v1/geo-breakdown?technology=ALL&rank=ALL&start=2026-09-01&end=2026-09-01
- Mobile Core Web Vitals pass rates were 42.0 percentage points higher for users in Japan than in Indonesia in September 2026, calculated by StatisticsGlobal from HTTP Archive data. Source: HTTP Archive, Core Web Vitals Technology Report (API), geo breakdown (September 2026 data, accessed 10 November 2026) https://cdn.httparchive.org/v1/geo-breakdown?technology=ALL&rank=ALL&start=2026-09-01&end=2026-09-01

Table: Share of websites with good Core Web Vitals for users in each country, 15 countries with the most mobile websites measured, September 2026

| Country | Good, mobile | Good, desktop | Mobile websites measured |
|---|---|---|---|
| United States | 63.3% | 65.4% | 1,288,504 |
| India | 31.6% | 50.9% | 745,962 |
| Japan | 71.4% | 76.9% | 606,580 |
| Brazil | 33.7% | 55.4% | 598,869 |
| Germany | 69.2% | 73.0% | 586,975 |
| France | 62.6% | 69.5% | 417,781 |
| United Kingdom | 67.6% | 69.3% | 412,823 |
| Indonesia | 29.4% | 53.6% | 383,720 |
| Italy | 53.6% | 65.6% | 376,767 |
| Russia | 53.1% | 70.1% | 356,067 |
| Spain | 53.1% | 64.2% | 335,434 |
| Poland | 63.5% | 69.8% | 273,724 |
| Canada | 67.4% | 66.8% | 253,874 |
| Mexico | 40.5% | 55.4% | 224,290 |
| Netherlands | 66.6% | 72.1% | 221,157 |

Source: HTTP Archive, Core Web Vitals Technology Report geo breakdown, September 2026. Calculated as good origins divided by origins measured.

## Core Web Vitals by CMS

HTTP Archive detects the platform each website runs on, so pass rates can be compared by content management system. The platforms below are among the most used CMSs.

Hosted platforms lead. Wix, Shopify, Webflow and Squarespace all pass on more than 70% of mobile sites. The platform runs the hosting and much of the code, so one fix reaches every site. Wix gained the most in two years, up 16.5 points since September 2024.

WordPress is last of the seven, at 48.3% on mobile. It is also by far the largest, with 2.66 million mobile sites measured. Each owner picks their own theme, plugins and host, so results vary widely. WordPress still improved by 5.8 points in two years. See our [WordPress statistics](https://statisticsglobal.org/wordpress-statistics/) and [CMS market share](https://statisticsglobal.org/cms-market-share/) pages for more on the platforms.

- 80.9% of mobile Wix websites had good Core Web Vitals in September 2026, according to HTTP Archive. Source: HTTP Archive, Core Web Vitals Technology Report (API), CMS platforms (monthly series to September 2026, accessed 10 November 2026) https://cdn.httparchive.org/v1/cwv?technology=WordPress,Shopify,Wix,Squarespace,Drupal,Joomla,Webflow&geo=ALL&rank=ALL&start=2024-09-01
- 76.2% of mobile Shopify websites had good Core Web Vitals in September 2026, according to HTTP Archive. Source: HTTP Archive, Core Web Vitals Technology Report (API), CMS platforms (monthly series to September 2026, accessed 10 November 2026) https://cdn.httparchive.org/v1/cwv?technology=WordPress,Shopify,Wix,Squarespace,Drupal,Joomla,Webflow&geo=ALL&rank=ALL&start=2024-09-01
- 71.0% of mobile Squarespace websites had good Core Web Vitals in September 2026, according to HTTP Archive. Source: HTTP Archive, Core Web Vitals Technology Report (API), CMS platforms (monthly series to September 2026, accessed 10 November 2026) https://cdn.httparchive.org/v1/cwv?technology=WordPress,Shopify,Wix,Squarespace,Drupal,Joomla,Webflow&geo=ALL&rank=ALL&start=2024-09-01
- 48.3% of mobile WordPress websites had good Core Web Vitals in September 2026, according to HTTP Archive. Source: HTTP Archive, Core Web Vitals Technology Report (API), CMS platforms (monthly series to September 2026, accessed 10 November 2026) https://cdn.httparchive.org/v1/cwv?technology=WordPress,Shopify,Wix,Squarespace,Drupal,Joomla,Webflow&geo=ALL&rank=ALL&start=2024-09-01
- Mobile Wix websites passed Core Web Vitals 32.6 percentage points more often than mobile WordPress websites in September 2026, calculated by StatisticsGlobal from HTTP Archive data. Source: HTTP Archive, Core Web Vitals Technology Report (API), CMS platforms (monthly series to September 2026, accessed 10 November 2026) https://cdn.httparchive.org/v1/cwv?technology=WordPress,Shopify,Wix,Squarespace,Drupal,Joomla,Webflow&geo=ALL&rank=ALL&start=2024-09-01
- Wix had the biggest rise in mobile Core Web Vitals pass rate of seven CMS platforms between September 2024 and September 2026, 16.5 points, calculated by StatisticsGlobal from HTTP Archive data. Source: HTTP Archive, Core Web Vitals Technology Report (API), CMS platforms (monthly series to September 2026, accessed 10 November 2026) https://cdn.httparchive.org/v1/cwv?technology=WordPress,Shopify,Wix,Squarespace,Drupal,Joomla,Webflow&geo=ALL&rank=ALL&start=2024-09-01

Table: Share of websites with good Core Web Vitals by CMS, September 2024 and September 2026

| CMS | Good, mobile, Sep 2024 | Good, mobile, Sep 2026 | Good, desktop, Sep 2026 | Mobile websites measured, Sep 2026 |
|---|---|---|---|---|
| Wix | 64.4% | 80.9% | 87.1% | 177,709 |
| Shopify | 71.8% | 76.2% | 79.5% | 445,297 |
| Webflow | 61.8% | 71.3% | 82.6% | 59,483 |
| Squarespace | 62.2% | 71.0% | 76.1% | 89,052 |
| Drupal | 57.8% | 64.7% | 66.1% | 93,193 |
| Joomla | 48.3% | 57.4% | 59.7% | 83,029 |
| WordPress | 42.5% | 48.3% | 53.7% | 2,658,175 |

Source: HTTP Archive, Core Web Vitals Technology Report, all countries and ranks. Calculated as good origins divided by origins measured.

## Core Web Vitals pass rate trend over time

HTTP Archive's monthly series starts in 2020. The table uses September of each year so every row covers the same month.

The pass rate has risen every year since 2020. On mobile it is 2.3 times the September 2020 level. Gains are slowing. Mobile added 8.3 points from 2020 to 2021 but only 2.3 points in the year to September 2026.

2026 has brought a small reversal on mobile. The pass rate peaked at 54.2% in April 2026 and fell to 52.8% by September. Most of the drop came from INP, down 2.9 points over the same months. Desktop kept rising, to a series high of 60.8%. One possible reason is heavier JavaScript, but HTTP Archive does not give a cause.

- The share of mobile websites with good Core Web Vitals rose 2.3 percentage points between September 2025 and September 2026, calculated by StatisticsGlobal from HTTP Archive data. Source: HTTP Archive, Core Web Vitals Technology Report (API), all technologies (monthly series to September 2026, accessed 10 November 2026) https://cdn.httparchive.org/v1/cwv?technology=ALL&geo=ALL&rank=ALL
- The share of mobile websites with good Core Web Vitals was 2.3 times higher in September 2026 than in September 2020, calculated by StatisticsGlobal from HTTP Archive data. Source: HTTP Archive, Core Web Vitals Technology Report (API), all technologies (monthly series to September 2026, accessed 10 November 2026) https://cdn.httparchive.org/v1/cwv?technology=ALL&geo=ALL&rank=ALL
- The mobile Core Web Vitals pass rate fell 1.4 percentage points between April and September 2026, calculated by StatisticsGlobal from HTTP Archive data. Source: HTTP Archive, Core Web Vitals Technology Report (API), all technologies (monthly series to September 2026, accessed 10 November 2026) https://cdn.httparchive.org/v1/cwv?technology=ALL&geo=ALL&rank=ALL
- Good mobile Interaction to Next Paint fell 2.9 percentage points between April and September 2026, calculated by StatisticsGlobal from HTTP Archive data. Source: HTTP Archive, Core Web Vitals Technology Report (API), all technologies (monthly series to September 2026, accessed 10 November 2026) https://cdn.httparchive.org/v1/cwv?technology=ALL&geo=ALL&rank=ALL
- 32% of mobile websites and 41% of desktop websites had good Core Web Vitals in 2021, according to HTTP Archive. Source: HTTP Archive, Web Almanac 2025, Chapter 11: Performance (15 January 2026 (updated 5 May 2026), accessed 10 November 2026) https://almanac.httparchive.org/en/2025/performance
- The share of mobile websites with good Core Web Vitals rose by half between 2021 and 2025, calculated by StatisticsGlobal from HTTP Archive data. Source: HTTP Archive, Web Almanac 2025, Chapter 11: Performance (15 January 2026 (updated 5 May 2026), accessed 7 November 2026) https://almanac.httparchive.org/en/2025/performance

Table: Share of websites with good Core Web Vitals, September 2020 to September 2026

| Month | Good, mobile | Good, desktop |
|---|---|---|
| September 2020 | 22.7% | 31.5% |
| September 2021 | 31.0% | 41.0% |
| September 2022 | 38.6% | 45.0% |
| September 2023 | 43.2% | 49.1% |
| September 2024 | 48.1% | 55.4% |
| September 2025 | 50.5% | 57.1% |
| September 2026 | 52.8% | 60.8% |

Source: HTTP Archive, Core Web Vitals Technology Report, all technologies. INP replaced First Input Delay as a Core Web Vital in March 2024.

## Does Core Web Vitals performance affect business results?

Pass rates show how fast the web is. Whether speed pays off is a separate question. The best public evidence comes from controlled tests by individual companies, not from large samples.

Vodafone ran an A/B test with half of traffic on each version of a landing page. The faster page sold 8% more. Deloitte looked at four weeks of mobile data from brands in Europe and the US and found that small speed gains went with higher conversions.

Treat these results with care. Each covers a few brands or one page, and both studies are several years old. Deloitte measured overall mobile speed, not Core Web Vitals. Google, which set the metrics, published the Vodafone study. For how speed links to visitors leaving, see our [bounce rate benchmarks](https://statisticsglobal.org/bounce-rate-benchmarks/).

- Vodafone Italy got 8% more sales from a landing page with 31% better Largest Contentful Paint, in a 2021 case study published by Google. Source: Google, Vodafone: A 31% improvement in LCP increased sales by 8% (17 March 2021, accessed 10 November 2026) https://web.dev/case-studies/vodafone
- Retail brands saw conversions rise 8.4% after a 0.1 second mobile site speed improvement, according to a 2020 Deloitte study. Source: Deloitte, Milliseconds Make Millions (24 March 2020, accessed 10 November 2026) https://www.deloitte.com/ie/en/services/consulting/research/milliseconds-make-millions.html
- Travel brands saw conversions rise 10.1% after a 0.1 second mobile site speed improvement, according to a 2020 Deloitte study. Source: Deloitte, Milliseconds Make Millions (24 March 2020, accessed 10 November 2026) https://www.deloitte.com/ie/en/services/consulting/research/milliseconds-make-millions.html

Table: Results reported after site speed improvements, by study

| Study | Change made | Result reported |
|---|---|---|
| Vodafone Italy (Google case study, 2021) | 31% better LCP on one landing page | 8% more sales |
| Deloitte, retail brands (2020) | 0.1 second faster mobile site | Conversions up 8.4%, average order value up 9.2% |
| Deloitte, travel brands (2020) | 0.1 second faster mobile site | Conversions up 10.1%, average order value up 1.9% |
| Deloitte, luxury brands (2020) | 0.1 second faster mobile site | Page views per session up 8.6% |
| Deloitte, lead generation pages (2020) | 0.1 second faster mobile site | Bounce rate improved 8.3% |

Sources: Google, web.dev Vodafone case study (17 March 2021). Deloitte, Milliseconds Make Millions (24 March 2020).

## How Core Web Vitals are measured

All the pass rates on this page come from the Chrome UX Report (CrUX), Google's public dataset of real Chrome user experiences. HTTP Archive joins it to its own crawl of millions of websites.

CrUX collects data from Chrome users on desktop and Android who have opted in to usage statistics and history sync. It leaves out Chrome on iOS and other browsers. A website is only included when it has enough traffic, and Google does not publish the exact threshold. So small sites are missing, and the figures describe Chrome users, not all users. Google publishes CrUX data under a Creative Commons Attribution 4.0 licence.

A website counts as good on a metric when its 75th percentile page load meets Google's threshold. It passes Core Web Vitals when LCP, INP and CLS are all good. HTTP Archive counts websites, not page views. A small site and a giant site each count once.

Definitions changed over time. Interaction to Next Paint replaced First Input Delay as a Core Web Vital on 12 March 2024, so long-run trends mix two definitions. The monthly Technology Report and the yearly Web Almanac use different queries and can differ by a point or two for the same month. Country figures cover users located in each country. CMS figures depend on HTTP Archive detecting the platform correctly.

The business studies are separate. They come from single companies or small groups of brands and were not designed to represent the whole web.


## Frequently asked questions

### What percentage of websites pass Core Web Vitals?

52.8% of mobile websites and 60.8% of desktop websites had good Core Web Vitals in September 2026, according to HTTP Archive's analysis of Chrome UX Report data.

### Are Core Web Vitals pass rates better than last year?

Yes, slightly. The mobile pass rate rose from 50.5% in September 2025 to 52.8% in September 2026, and desktop rose from 57.1% to 60.8%. Mobile has dipped since a peak of 54.2% in April 2026.

### Which Core Web Vital do most sites fail?

Largest Contentful Paint. 34.4% of mobile websites did not have a good LCP in September 2026, compared with 20.6% for INP and 16.6% for CLS.

### Which CMS has the best Core Web Vitals?

Of seven major platforms, Wix led in September 2026, with 80.9% of mobile sites passing. Shopify followed at 76.2%. WordPress was lowest at 48.3%.

### Which country has the best Core Web Vitals?

Among the 15 countries with the most websites measured, users in Japan had the highest mobile pass rate in September 2026, at 71.4%. Users in Indonesia had the lowest, at 29.4%.

### Why do mobile sites fail Core Web Vitals more than desktop?

Phones have less processing power and often slower networks. That hurts loading (LCP) and responsiveness (INP). Only 79.4% of mobile sites had a good INP in September 2026, against 97.6% on desktop.

## Sources

1. HTTP Archive, Core Web Vitals Technology Report (API), all technologies, monthly series to September 2026, accessed 10 November 2026. https://cdn.httparchive.org/v1/cwv?technology=ALL&geo=ALL&rank=ALL
2. HTTP Archive, Core Web Vitals Technology Report (API), CMS platforms, monthly series to September 2026, accessed 10 November 2026. https://cdn.httparchive.org/v1/cwv?technology=WordPress,Shopify,Wix,Squarespace,Drupal,Joomla,Webflow&geo=ALL&rank=ALL&start=2024-09-01
3. HTTP Archive, Web Almanac 2025, Chapter 11: Performance, 15 January 2026 (updated 5 May 2026), accessed 7 November 2026. https://almanac.httparchive.org/en/2025/performance
4. Google, Web Vitals, 4 May 2020 (updated 31 October 2024), accessed 10 November 2026. https://web.dev/articles/vitals
5. HTTP Archive, Core Web Vitals Technology Report (API), geo breakdown, September 2026 data, accessed 10 November 2026. https://cdn.httparchive.org/v1/geo-breakdown?technology=ALL&rank=ALL&start=2026-09-01&end=2026-09-01
6. Google, Vodafone: A 31% improvement in LCP increased sales by 8%, 17 March 2021, accessed 10 November 2026. https://web.dev/case-studies/vodafone
7. Deloitte, Milliseconds Make Millions, 24 March 2020, accessed 10 November 2026. https://www.deloitte.com/ie/en/services/consulting/research/milliseconds-make-millions.html