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How is User Happiness calculated?

SpeedVitals RUM uses the following formula to calculate User Happiness. We are continuously making improvements to this metric to make it more relevant.

A Happy visit is when:​

The User visit passes Core Web Vitals p75 values (LCP < 2500 ms, INP < 200 ms, CLS < 0.1)

AND

p75 TTFB < 1100 ms

AND

p75 FCP < 1800 ms

An Unhappy visit is when:​

Fails p75 of any Core Web Vital metric on the visited page

OR

p75 TTFB > 1800

OR

P75 FCP > 3000

Neither Happy nor Unhappy​

When a page visit doesn't fall under any of the above categories, it is considered to be neither happy nor unhappy.