Sleep Calculator

Find the ideal wake-up times based on 90-minute sleep cycles to feel rested and energized.

📋 Data Entry

Mode

Wake-up time

Minutes to fall asleep

📄 Result

Result

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⚠️ Sleep timing varies individually. Consistent sleep and wake times are more important than perfect cycle alignment.

About this calculator

Sleep is divided into ~90-minute cycles. Waking at the end of a complete cycle (not in the middle) leaves you feeling more rested. This calculator suggests ideal wake-up or bedtime options. Most adults need 5–6 complete cycles (7.5–9 hours) per night.

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