90 Minute Timer
Click Start to begin the 90 minute timer. The countdown runs in your browser and alerts you when time is up.
90 Minute Timer
01Hours
30Minutes
00Seconds
About the 90 Minute Timer
Ninety minutes aligns with one full sleep cycle and is considered the optimal deep-work session length by productivity researchers like Cal Newport.
Need a different duration? Use our custom timer to set any hours, minutes, and seconds combination. For counting down to a specific date, try our Countdown Timer.