The most recent broad figures come from the 2025 Web Almanac Performance chapter, which uses July 2025 measurements: 48% of mobile websites and 56% of desktop websites achieved good Core Web Vitals. Those percentages describe populations of websites, not how fast any one page loads, and they only mean something when the year, device, metric and measurement method are stated alongside them.
How to read a site speed statistic
Every performance figure answers four questions: which year, which device class, which metric, and what is being counted. A “websites” percentage counts sites, a “home pages” figure counts one page type, and a Search Console group counts a set of similar URLs. Setting these side by side as if they shared a denominator produces misleading comparisons.
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- Year. The 2025 Web Almanac uses July 2025 data. The 2024 edition uses 2024 data, and some of its milestones were measured in June 2024.
- Device. Mobile and desktop are always reported separately. In both annual editions cited here, mobile results trail desktop results for Core Web Vitals.
- Method. Lab data is a controlled page-load observation. Field data records what real visitors experienced.
- Unit. Sites, page types and URL groups are different denominators, and the same site can appear differently in each.
Core Web Vitals thresholds
Core Web Vitals are three metrics that Google uses to describe loading, responsiveness and visual stability. They do not measure “speed” as a single number. Google’s good thresholds, as stated in its Search Central documentation (current as of October 2026), are:
| Metric | What it captures | Good threshold |
|---|---|---|
| Largest Contentful Paint (LCP) | When the largest content element in the viewport appears | 2.5 seconds or less |
| Interaction to Next Paint (INP) | Responsiveness across user interactions during the visit | 200 milliseconds or less |
| Cumulative Layout Shift (CLS) | How much visible content moves unexpectedly | 0.1 or less |
INP replaced First Input Delay (FID) as the responsiveness metric in Core Web Vitals, and it measures a broader set of interactions than FID did. That change matters when you compare years, as the 2024 section below explains. Google states that good Core Web Vitals align with what its core ranking systems seek to reward, but passing them is not a guarantee of any ranking gain.
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Core Web Vitals pass rates in 2025
The 2025 Web Almanac reports the share of pages or sites achieving good Core Web Vitals in July 2025, combining HTTP Archive lab measurements with real-user experience data from the Chrome User Experience Report (CrUX).
| Scope (July 2025) | Mobile good CWV | Desktop good CWV |
|---|---|---|
| All websites | 48% | 56% |
| Home pages | 45% | 47% |
| Secondary pages | 56% | 61% |
Home pages trail secondary pages on both devices. The report notes that caching and more templated pages may help explain the gap. That is a plausible explanation the authors offer, not a measured cause. The page-type rows are a different unit from the all-websites row, so do not add or subtract them.
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The 2024 figures and the INP switch
The 2024 Web Almanac reported 43% of mobile websites with good Core Web Vitals when INP was used, compared with 48% if the former FID metric had been used. For desktop, it reported 54% of websites with good Core Web Vitals in 2024, a figure the source gives as the same regardless of whether FID or INP was used.
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Loading milestones: FCP and TTFB
Core Web Vitals are not the only measures in the Web Almanac. First Contentful Paint (FCP) is the time from the user’s request until the first content is rendered, with a good threshold under 1.8 seconds. Time to First Byte (TTFB) is the time until the browser receives the first byte of the response. It includes redirects, DNS lookup, connection and TLS setup, and server request processing, so a slow TTFB often points to hosting or network latency rather than front-end code.
| Metric | Device | Result | Measurement period |
|---|---|---|---|
| Good FCP | Desktop | 68% | June 2024 |
| Good FCP | Mobile | 51% | June 2024 |
| Good TTFB | Mobile | 42% good, 40% needs improvement, 19% poor | 2024 |
| Good TTFB | Desktop | Not stated in the 2024 Web Almanac figures cited here | 2024 |
The mobile TTFB categories are the Web Almanac’s rounded values and add up to 101%. The rounding is in the source, so the figures are shown as published.
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Page weight and request counts
The State of Web Vitals’ Q2 2026 field dataset puts the typical desktop page at 2.3 MB across 71 requests. Its 75th-percentile desktop page weighs 4.5 MB, which means one page in four in that sample is heavier than that. The page-weight view draws on 185,486 desktop sites, and the wider explorer on 189,915. These are field observations from that dataset, not a census of the whole web, so treat them as a benchmark for sites measured in the tool rather than a universal average.
Why lab, field and Search Console results disagree
- Lab tests run a page under controlled conditions. They are repeatable and useful for diagnosing causes, but they are not what visitors experienced.
- Field data reflects real visits. The 2024 Web Almanac cautions that CrUX reflects Chrome users rather than all browsers or all world regions, so a site’s audience mix shapes its results.
- Search Console’s Core Web Vitals report groups similar URLs and shows historical real-user data. It is useful for spotting patterns across templates, but it does not list every indexed URL or report the status of a single URL.
- PageSpeed Insights generally evaluates one URL. Its result for that URL can differ from the grouped report, which covers many URLs.
Checking your own site
- Open Google Search Console, select your property, and go to Experience > Core Web Vitals.
- Switch between the Mobile and Desktop views. Note which URL groups are marked Poor or Needs improvement and how many URLs each group contains.
- Open PageSpeed Insights, paste one URL from a flagged group, and run the test.
- Read the field data section first for real-user results at the 75th percentile, then use the lab diagnostics to find likely causes.
- Record the device, test date, page type and data source with every number you keep, so any later comparison uses the same basis.
Field data and lab diagnostics answer different questions, so a difference between them is expected rather than a sign that one tool is broken.
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