Sleep Calculator
Plan sleep using 90-minute cycles. Find ideal bedtimes from a wake time, or ideal wake times from a bedtime.
Tip
Aim for 5–6 sleep cycles (7.5–9 hours). This planner adds a configurable fall-asleep time.
00:46
4 cycles (6 hours)
Bed
23:16
5 cycles (7.5 hours)
Bed
21:46
6 cycles (9 hours)
Bed
20:16
7 cycles (10.5 hours)
Bed
How to use
- Choose whether you want to calculate bedtimes or wake times.
- Enter your wake time or bedtime.
- Pick a result based on number of sleep cycles.
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