Sleep Cycle Calculator
Enter a wake-up time and get recommended bedtimes based on cycle counts and sleep latency.
- 4 to 6 cycle suggestions
- Custom fall-asleep delay
- Simple bedtime list
Sleep Planning Calculators
Four quick calculators to plan bedtime, wake-up timing, and sleep debt recovery.
Bedtime Calculator
Choose one target cycle count and get a specific bedtime to hit your wake-up goal.
- Cycle count selector
- Single recommended bedtime
- Fast mobile input
Wake Time Calculator
Enter your bedtime to see wake-up options after full 90-minute cycles.
- Multiple wake-up options
- Latency-aware estimates
- Readable schedule output
Sleep Debt Calculator
Estimate cumulative sleep debt and get a practical plan for how many recovery nights you may need.
- Debt estimate in hours
- Recovery nights projection
- Works with your target sleep duration
Sleep Planning FAQ
How long is one sleep cycle?
A typical estimate is about 90 minutes per cycle.
How many cycles should I aim for?
Many adults feel better with 5 or 6 cycles, but personal sleep needs vary.
What is sleep debt?
Sleep debt is the accumulated gap between the sleep you need and the sleep you actually get over multiple days.
Are these medical recommendations?
No. These are planning estimates, not a substitute for clinical advice.
Related Tools
For daily health planning, visit HealthKit for calorie and macro tools. For execution planning, use FocusKit. For deadlines and calendar math, use DateKit, and for cost guardrails use BudgetKit. Browse the full suite directory in Life Kits.