About this tool
Best time to sleep or wake based on sleep cycles.
How we calculate: Ciclos de sono de 90 minutos + 15 minutos para adormecer.
🗓️ Values updated in Janeiro de 2026. Informational result, with no fiscal or official value.
😴 Sleep Calculator
Wake up at the end of a cycle and feel rested.
📖 How to use this tool
▾
- Choose whether to calculate bedtime or wake-up time.
- Enter the time.
- The system calculates 4 to 6 sleep cycles of 90min + 15min to fall asleep.