Sleep Cycle Calculator
Calculate optimal bedtimes based on 90-minute sleep cycles and your wake-up time.
How to Use the Sleep Cycle Calculator
- Enter the required values into the input fields.
- Click the Calculate button to see the results.
- Review the output values and interpretations below.
Schnellreferenz
| Von | Nach |
|---|---|
| 3 cycles | 4h 30m (minimum) |
| 4 cycles | 6h 00m |
| 5 cycles | 7h 30m |
| 6 cycles | 9h 00m (optimal) |
Anwendungsfälle
- •Monitoring personal health metrics and tracking changes over time.
- •Supporting clinical decision-making with quick formula-based estimates.
- •Educational use for students learning health and fitness calculations.
Formel
Formula: Bedtime = Wake time − (Cycles × 90 min) − 15 min (to fall asleep). One cycle = 90 minutes.
Häufig gestellte Fragen
What is a sleep cycle?
A sleep cycle lasts about 90 minutes and includes light sleep, deep sleep, and REM (dream) sleep. Waking between cycles helps you feel more refreshed.
How many sleep cycles do I need?
Adults need 5-6 cycles (7.5-9 hours) per night. The minimum for short-term function is 3 cycles (4.5 hours), but this is not sustainable.
Why add 15 minutes?
The 15-minute buffer accounts for the average time it takes to fall asleep. If you typically fall asleep faster or slower, adjust accordingly.