Sleep Cycle & Bedtime Calculator

Wake up between cycles, not in the middle of one.

Sleep Cycle & Bedtime Calculator works in either direction: enter a wake-up time to get a list of bedtimes, or enter a bedtime to get a list of wake-up times — each option showing the exact number of 90-minute sleep cycles and total hours, with the 5 and 6 cycle options (7.5-9 hours) flagged as recommended. A configurable fall-asleep buffer accounts for the time between lying down and actually falling asleep, so the math reflects real bedtime rather than an idealized instant sleep onset.

→Calculate bedtimes from a target wake-up time, or wake-up times from a bedtime
→Shows 3 to 6 sleep cycles with exact total sleep duration for each
→5 and 6 cycle options (7.5-9 hours) flagged as recommended for most adults
→Configurable fall-asleep buffer for realistic timing
→"Use Current Time" shortcut for figuring out wake-up time from right now
→100% local calculation — nothing you enter is sent to a server
→Watermarked by Cikal Studio Labs · Works on any device, no install required

90-Min CyclesFall-Asleep BufferBoth DirectionsRecommended Range

$2.99

One-time purchase · No subscription

⚡Opens instantly after payment — no install

🔒Secure PayPal checkout

♾️Your link, yours to keep — use it anytime

📱Works on phone and computer

🌍Available worldwide

📝 Related Article

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