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Sleep Cycle Optimizer

Find your ideal bedtime or wake time by aligning sleep with natural 90-minute cycles. Use it when planning your schedule to wake refreshed instead of groggy.

Number of Sleep Cycles

Time to Fall Asleep (minutes)

Buffer Time (minutes)

Fill in the required fields to see your result.

Sleep

Sleep Cycle Calculator

Find your ideal bedtime by working backward from your wake-up time in complete 90-minute sleep cycles. Waking at the end of a cycle (rather than mid-cycle) leaves you feeling more refreshed than the same total hours timed less carefully.

Desired Wake Time (hours (24h format))

Number of Sleep Cycles (cycles)

Fill in the required fields to see your result.

Key differences

	Sleep Cycle Optimizer	Sleep Cycle Calculator
Category	Sleep	Sleep
Inputs required	3	2
Result	Total Time Needed (minutes)	Optimal Bedtime (hours)
What it does	Find your ideal bedtime or wake time by aligning sleep with natural 90-minute cycles. Use it when planning your schedule to wake refreshed instead of groggy.	Find your ideal bedtime by working backward from your wake-up time in complete 90-minute sleep cycles. Waking at the end of a cycle (rather than mid-cycle) leaves you feeling more refreshed than the same total hours timed less carefully.