Sleep Duration Check

✓ Checks Health

Sleep Duration Check

Check the time between bedtime and wake time against a sleep target you choose yourself.

Free to use Reviewed Oct 1, 2026
Runs in your browser. No account or submission required.
Your result —

Enter your values to see the result.

Change your target
Shared links include the values entered on this page.

Duration compared with your own target

This check calculates elapsed time only. The target is whatever number you enter; the tool does not diagnose sleep problems or prescribe a sleep duration.

Methodology

How this resource works

Sleep duration is the elapsed time from bedtime to wake time, treating wake times earlier than bedtime as occurring the following day. Difference = duration − entered target.