If I sleep now, when should I wake up?
These times add 15 minutes for falling asleep, then count forwards in 90-minute sleep-cycle estimates.
Calculating from your current local time…
Give yourself enough sleep
The shorter options represent very short nights. Whenever possible, favour a longer option: cycle timing does not replace sufficient total sleep. The calculations are estimates and cannot detect your actual sleep stages.
Read how the calculation works and where it has limits →