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

02:22 AM

~15 minutes after going to bed

Choose a Sleep Cycle

1 Cycle (1.5h)

03:52 AM

2 Cycles (3.0h)

05:22 AM

3 Cycles (4.5h)

06:52 AM

4 Cycles (6.0h)

08:22 AM

5 Cycles (7.5h)

09:52 AM

6 Cycles (9.0h)

11:22 AM

Wake at 11:22 AM after 9.0 hours of sleep.