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Sleep Cycle Planner

Find the ideal bedtime to wake up feeling rested by timing sleep to complete full 90-minute cycles.

Wake Time — Hour (0–23)

Wake Time — Minute (0–59)

Limitations: Actual cycle length varies between 80–110 minutes per person. This is an approximation, not a clinically measured value.

What to do next: Try to wake at the end of a cycle rather than in the middle of deep sleep. Consistency in wake time matters more than bedtime.