Apdex score calculator
Turn response times and a target threshold into an Apdex score from 0 to 1, with a rating.
How it works
Requests at or under the target T count as satisfied, up to four times T as tolerating, and anything slower as frustrated. Tolerating requests count half.
Apdex = (satisfied + tolerating ÷ 2) ÷ totalQuestions
What target should I use?
Pick the time at which users stop noticing a delay for that page or call, often 300 to 500 ms for APIs.
What is a good score?
0.94 and above is excellent, 0.85 good, 0.7 fair and below 0.5 unacceptable.