Sleep Cycle Calculator

Sleep works in 90-minute cycles. Choose how many you want — from 1 (1.5h) to 6 (9h) — and we’ll show ideal wake-up times.

Time You’re Going to Bed

Falling Asleep Around

05:23 PM

~15 minutes after going to bed

Choose a Sleep Cycle

1 Cycle (1.5h)
06:53 PM
2 Cycles (3.0h)
08:23 PM
3 Cycles (4.5h)
09:53 PM
4 Cycles (6.0h)
11:23 PM
5 Cycles (7.5h)
12:53 AM
6 Cycles (9.0h)
02:23 AM
Wake at 02:23 AM after 9.0 hours of sleep.