Speed Tools
theguardian.com vs nhk.or.jp vs bbc.com vs nbcnews.com vs aljazeera.com
Core Web Vitals compared on real Chrome user data.
Comparison ranking
Ranked by the share of real Chrome visits that scored ‘Good’ on all three Core Web Vitals: visual load speed (LCP), layout stability (CLS), and interaction responsiveness (INP).
- 🏆89.5
- 🥈87.3
- 🥉86.7
- 482.9
- 581.1
Performance ranking over time
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theguardian.com
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nhk.or.jp
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bbc.com
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nbcnews.com
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aljazeera.com
Core Web Vitals compared
| 🏆 916 ms | 0.05 | 105 ms | |
| 1.37 sec | 0.07 | 🏆 97 ms | |
| 1.39 sec | 0.03 | 134 ms | |
| 1.56 sec | 0.11 | 123 ms | |
| 1.70 sec | 🏆 0.02 | 270 ms |
Every page, every site — monitored automatically
Calibre scans your sites and pulls real-user Core Web Vitals straight from Google’s Chrome User Experience Report. No scripts, no setup, no busywork.
Your questions answered
How are sites ranked in the comparison?
Each website receives a score from 0 to 100 based on the proportion of 'good' real user experiences across the three Core Web Vitals: Largest Contentful Paint (LCP), Cumulative Layout Shift (CLS) and Interaction to Next Paint (INP). The score is the average of these three proportions.
Where does the data come from, and how often is it updated?
Data comes from Google’s Chrome User Experience Report (CrUX), a public dataset of real user experiences from opted-in Chrome users. Aggregate scores refresh daily; the month-over-month history chart updates weekly.
Why is this score different from PageSpeed Insights or Lighthouse?
This score reflects thousands of real Chrome users over the last 28 days (CrUX field data). PageSpeed Insights and Lighthouse provide data from a single test run from a controlled environment.
How do Core Web Vitals impact SEO?
Google uses Core Web Vitals as a page-ranking signal. Meeting the recommended thresholds for LCP, CLS and INP helps maximise search visibility — sites that consistently pass tend to outrank slower competitors on the same query.
Why is there no data for a website?
A site needs enough Chrome traffic to appear in the CrUX dataset. If a site shows no data, it may be too new, too small, or behind authentication.
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