Sleep Cycle Calculator (90-Minute Cycles)

What do you want to calculate?
Choose your calculation mode — either find your ideal bedtime or your ideal wake-up time.
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What time do you need to wake up?
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What time are you going to bed?
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How long do you usually take to fall asleep?
This is your sleep-onset latency – time between lying down and actually falling asleep.
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How many sleep cycles do you want to aim for?
Each cycle lasts approx 90 min. Select one options.
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