SLEEP CALCULATOR
Find the best time to sleep and wake up
Choose when you want to wake up, or calculate suggested wake-up times if you are going to bed now.
Bedtime
Sleep cycles are approximate and do not last exactly 90 minutes for everyone. The calculator also allows about 15 minutes to fall asleep.
How does it work?
The calculator uses approximate 90-minute sleep cycles and a 15-minute sleep-onset allowance. 7.5 and 9 hours are both highlighted as recommended sleep durations.
6cycles · 9h · Recommended
5cycles · 7.5h · Recommended
4cycles · 6h
3cycles · 4.5h
2cycles · 3h
1cycle · 1.5h