Core Web Vitals Measurement Methods | The Ins & Outs

Core Web Vitals

Written by Jeremy Earle, JD

May 9, 2022

Many of Google’s current products utilize Core Web Vitals measuring capabilities. You may find out more about them by reading this.

When it comes to improving user experience, Google has laid down a list of criteria to which webmasters should pay attention.

Google defines these Core Web Vitals to give consistent guidelines for the quality signals that Google believes are crucial for providing a great user experience on the internet.

To achieve long-term success, each website must focus on improving the quality of the user experience.

You may use Web Vitals as a company owner, marketer, or developer to measure your site’s performance and find areas for improvement.

For this reason, Google places more significance on Core Web Vitals than on any other indicators.

Some people’s expectations for online experiences fluctuate depending on the site and circumstance, whereas others stay constant.

All websites should strive to address the core demands of their users, which are known as Core Web Vitals.

According to Google, the most important aspects of a good user experience are fast loading times, good interaction, and stable visuals.

Those user experience demands may be quantified in this way.

Using Core Web Vitals to Measure User Satisfaction

According to Google, the following metrics may be used by website owners to assess the quality of their site’s user experience:

The time it takes for the page’s primary content to load.

  • Largest Contentful Paint: A LCP reading of less than or equal to 2.5 seconds is considered desirable.
  • First Input Delay: The amount of time it takes for a page to become interactive once the first input is received. Ideally, the reading should be less than or equal to 100 ms.
  • Unexpected Layout Shift: The quantity of visual page material that unexpectedly shifts in layout. Ideally, the measurement should be less than 0.1.

According to Google’s explanation, these three metrics are critical since they “all capture crucial user-centric outcomes, are field observable, and have accompanying lab diagnostic metric equivalents and tools.” Google.

For example, while Largest Contentful Paint (L.C.P.) is the most important loading statistic, it is also heavily reliant on First ContentfulPaint (F.C.P.) and Time to First Byte (T.T.F.B.), which remain vital to monitor and improve.”

  • Related: Explains Google’s Ranking Factors for Usability and User Experience
  • Core Web Vitals: A Quick Guide
  • Many of Google’s current products utilize Core Web Vitals measuring capabilities.
  • Google Search Console, PageSpeed Insights, Lighthouse, Chrome Dev Tools, Chrome UX Report, and Web Vitals Extension may now all be used to assess core web vitals.
  • Learn more about using each of these tools to determine the Core Web Vitals in the following sections.

Use the Search Engine

Core Web Vitals is a new report in Search Console that helps site owners examine all pages on a site.

As a result of the data in the Chrome UX report, several websites are flagged as needing improvement.

Please be advised that URLs that do not contain the required reporting data will be excluded from this report.

Insights from PageSpeed

As of Lighthouse 6.0, PageSpeed Insights can now measure Core Web Vitals in both the lab and the field, allowing for a more comprehensive report.

There is a blue ribbon next to each of the Core Web Vitals.


Updated measurements have been added to Lighthouse, and a new performance score has been added to the tool.

Largest Contentful Paint and Cumulative Layout Shift are two new metrics included (C.L.S.).

Using Core Web Vitals data in the lab, you can diagnose your website’s performance and improve the user experience.

Another Core Web Vitals measure, Total Blocking Time (TBT), is closely related to First Input Delay (FID).

Updates have been made to all of the products powered by Lighthouse.

The Chrome UX Report

This study is available to everyone, an open collection of millions of websites’ genuine user experience data, known as CrUX.

Rather than presenting lab results, the Chrome UX report analyses data from real-world situations to conclude user experience.

A new Core Web Vitals landing page has been added to Google’s report in the last few weeks.

Here is the link to the report.

The Chrome DevTools

Google Chrome’s DevTools have been upgraded to assist webmasters in detecting and addressing visual instability problems on a website that might lead to Cumulative Layout Shift (C.L.S.).

The Summary tab displays information about each Layout Shift you’ve selected. The fields Moved from and Moved to may be seen by moving your cursor over them.

It is also possible to measure Total Blocking Time (TBT) using the Chrome DevTools (FID).

In the Chrome DevTools Performance tab, you may see TBT in the footer when testing page performance.

In the lab, performance improvements that enhance TBT should also improve FID.

An Add-on for Web Health

The three Core Web Vitals metrics are being measured in real-time by a new Chrome extension currently accessible in the Chrome Web Store.

Installing the extension is as simple as clicking this link and following the on-screen instructions.

Is There Anything Else That Can Be Measured?

While the Core Web Vitals are important, they should not be the only metrics considered when designing for the user.

The Core Web Vitals will be updated yearly as Google improves its knowledge of the user experience.

On top of that, Google will publish information on the future Web Vitals candidates and why they were selected, and when they will be implemented.

Now, the corporation is substantially investing in enhancing its knowledge of page speed: “We are investing in establishing greater understanding and ability to assess page speed and other essential user experience attributes, looking forward to 2021..”.

New metrics to measure and quantify smoothness; primitives and supporting metrics that will allow immediate and privacy-preserving experiences on the web; and more” are just a few examples of how this might be done.

You May Also Like…

Site Speed Optimization Services

Site Speed Optimization Services

Web page speed optimization services are a critical component of an often-overlooked SEO strategy. If your website...