Note: Each sleep cycle is ~90 minutes. Falling asleep takes about 15 minutes. For best results, aim to wake up at the end of a complete cycle.
💤 What is Sleep Cycle Calculator?
The Sleep Cycle Calculator helps you figure out the best time to go to bed or wake up based on your body’s natural sleep patterns. Each full sleep cycle lasts about 90 minutes, and completing full cycles helps you wake up refreshed and alert.
6 cycles (9 hours): Ideal for full rest and recovery — best for active or stressed individuals.
5 cycles (7.5 hours): Recommended for most healthy adults — balances energy and focus.
4 cycles (6 hours): Minimum needed to avoid grogginess — better than broken sleep.
By syncing your sleep with these natural cycles, you can avoid waking up mid-cycle and feel more energetic throughout the day.