| Option 1 (5 cycles, 7.5h) | hesaplanacak |
|---|---|
| Option 2 (6 cycles, 9h) | hesaplanacak |
| Option 3 (4 cycles, 6h) | hesaplanacak |
| Recommended Cycles | hesaplanacak |
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How Sleep Cycles Work
Sleep is structured in 90-minute cycles, each consisting of light sleep, deep sleep, and REM (Rapid Eye Movement) sleep. Waking up at the end of a complete cycle — rather than in the middle of deep sleep — is the key to feeling refreshed and alert in the morning.
Calculate Your Ideal Bedtime
To wake up at a specific time feeling rested, count back in 90-minute increments:
- Wake at 7:00 AM → Sleep at: 5:30 AM / 4:00 AM / 2:30 AM / 1:00 AM / 11:30 PM / 10:00 PM
- Aim for 5–6 complete cycles (7.5–9 hours) for optimal rest
- Add 15 minutes to each time to account for falling asleep
Recommended Sleep by Age (National Sleep Foundation)
| Age Group | Recommended Sleep |
|---|---|
| Newborns (0–3 months) | 14–17 hours |
| Infants (4–11 months) | 12–15 hours |
| Toddlers (1–2 years) | 11–14 hours |
| School-age (6–13 years) | 9–11 hours |
| Teenagers (14–17 years) | 8–10 hours |
| Adults (18–64 years) | 7–9 hours |
| Older adults (65+) | 7–8 hours |
Sleep Hygiene Tips
- Maintain a consistent sleep/wake schedule, even on weekends
- Avoid caffeine after 2 PM
- Keep the bedroom cool (16–19 degrees C / 60–67 degrees F)
- Avoid blue light (screens) for 1 hour before bed
- Avoid alcohol — it fragments sleep architecture even if it aids falling asleep
How to Use This Calculator
Using our calculator is simple: enter the required values into the input fields and click the calculate button. Results are displayed instantly on screen. You can adjust the values and recalculate to compare different scenarios and find the best option for your situation.
Frequently Asked Questions
| Question | Answer |
|---|---|
| How accurate are the results? | We use standard formulas and up-to-date 2025 rates. Individual circumstances may vary slightly. |
| Is this calculator free? | Yes, completely free and no registration required. |
| What should I do for exact figures? | For precise information, consult a relevant professional or official authority. |
| Does it work on mobile devices? | Yes, it works seamlessly on all devices and screen sizes. |
Important Notes
This calculator is provided for informational purposes only. For legal, financial, or medical decisions, always seek advice from qualified professionals. Calculation results do not constitute official documents. Legislative changes may affect results; please visit the relevant official website for the most up-to-date information. Our calculators are regularly updated to reflect current regulations and rates.
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