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How to read a Lighthouse score without a developer

Google's free speed report looks technical. Four numbers and one habit are all you need to understand it.

Run it yourself in two minutes

Go to Google's PageSpeed Insights page. Paste your website address. Wait about thirty seconds. You will see a mobile report first and a desktop tab beside it.

Look at mobile. That is where most of your visitors are, and it is the harder test. Google runs your page on a simulated slow phone and grades what happens.

The four scores

Near the top you will see four circles: Performance, Accessibility, Best Practices and SEO. Each runs from 0 to 100. Green is 90 and up. Orange is 50 to 89. Red is below 50.

Performance is the one people quote, and the one that swings the most. The other three are mostly checklists. A site can score 100 on SEO here and still rank poorly. Treat those three as hygiene, not marketing.

What the performance number is made of

Scroll down and you will see a handful of timings. Three matter most for an owner.

Largest contentful paint is how long the biggest thing on screen takes to appear, usually your hero image. Google wants it under 2.5 seconds. Past 4 seconds is a fail.

Cumulative layout shift measures how much the page jumps around while loading. If you have ever tapped a button that moved, that is it. Lower is better.

Total blocking time is how long the page is frozen by scripts before you can tap anything. Plugins and trackers push this up.

Why your score changes every time

Run it twice and you will get two numbers. That is normal. Network conditions, server load and the time of day all move it.

Run it three times and take the middle result. Compare like with like: mobile to mobile, same page, same week. A ten-point swing on one run means nothing. A forty-point gap between two sites means a lot.

What good enough looks like

If your mobile performance score sits in the 90s and the three timings are green, you pass. Do not spend money chasing a 100.

If it sits in the 50s or 60s, your hero image is probably too big. Your page is probably also loading scripts for things you do not use. Both are fixable. If it is red, visitors on a phone are leaving before they see your phone number.

What we do with it

We measure your current site before we rebuild anything. You see the number. If your site already passes, we say so, and you can decide whether a rebuild is still worth it for other reasons.

Then we measure the rebuild and show both side by side. One measured rebuild, a Houston printer, went from a performance score of 65 to 98. Its largest paint arrived 4.7 seconds sooner and its requests dropped from 176 to 16. That is one site, not an average. Yours gets measured the same way.

  • Check mobile, not desktop.
  • Run it three times, take the middle.
  • Watch largest contentful paint first.
  • Ask for before and after numbers from anyone who rebuilds your site.

See the match before you decide.

Paste your URL. We rebuild it, show you the match, and measure the speed. No template. No blank page. Human review from start to finish.

See your site rebuilt →Call (832) 422-7266