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Sleep Calculator
Find the best time to sleep or wake up based on sleep cycles. Calculate optimal bedtime for refreshing sleep and energy.
Wake up at:
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💡 Sleep Tips
• Avoid screens 1h before bed
• Keep a consistent sleep schedule
• Keep room temperature cool (18-20°C)
ℹ️ About Sleep Calculator
Calculate optimal sleep and wake times. Find the best times to go to bed or wake up based on sleep cycles. Wake up feeling refreshed by timing your cycles.
💡 Use Cases
Finding optimal bedtimes
Calculating wake times
Understanding sleep cycles
Improving sleep quality
Planning around schedules
📋 How to use
1
Enter desired wake time OR bedtime
2
View optimal times based on 90-min cycles
3
Choose a time that gives complete cycles
4
Account for time to fall asleep
💎 Pro Tips
- Each sleep cycle is about 90 minutes
- 5-6 complete cycles (7.5-9 hours) is ideal
- Account for 15-20 min to fall asleep
❓ Frequently Asked Questions
A 90-minute pattern of light sleep, deep sleep, and REM stages.
Waking mid-cycle causes grogginess. Time sleep to complete cycles.
Most adults need 7-9 hours (5-6 complete cycles) per night.