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Sleep Cycle Calculator
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Calculate optimal sleep times based on 90-minute cycles. Choose wake time to get best bedtimes or bedtime to get best wake times. Sleep debt and nap optimizer included.
How to Use
- 1Select mode: 'I want to wake at X' or 'I'm going to bed at X'
- 2Enter the target wake time or bedtime
- 3Click Calculate to see 4–6 options - each shows the number of sleep cycles and a recommendation badge
- 4The Recommended option (5 cycles = 7h 30m) is highlighted
- 5Scroll down for the Sleep Debt Calculator - enter target and actual hours for the week
Features
- Two modes: wake-at-X and go-to-bed-at-X
- Shows 4–6 time options with cycle count
- Recommended option highlighted (5 cycles = 7h 30m)
- Sleep debt calculator (target vs actual hours)
- Power nap (10 min), energy nap (20 min), full-cycle nap (90 min) advisor
- 100% browser-based
Frequently Asked Questions
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