SnoozeMetrics · Tools

Sleep calculators

Free tools built on the science of 90-minute sleep cycles — time your bedtime, naps and travel so you wake up between cycles, not in the middle of one.

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Sleep Cycle Calculator

Find the ideal bedtime or wake time based on 90-minute cycles.

Try it →

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Nap Calculator Coming soon

Power nap or full cycle — time it so you wake up refreshed.

Coming soon

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Jet Lag Calculator Coming soon

Build an adjustment plan between two time zones.

Coming soon

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Sleep Sounds Player Coming soon

Original ASMR and noise tracks to help you drift off and stay asleep.

Coming soon

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Caffeine Cut-off Calculator Coming soon

Find your last safe coffee of the day, based on caffeine's half-life.

Coming soon