💤 Sleep Cycle Calculator

Optimize your sleep with natural 90-minute cycles

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When should I go to bed?

Calculate your bedtime to wake up at a specific time

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When should I wake up?

If you go to bed now, here are the best wake-up times

How does it work?

🌙 Sleep cycles

Sleep consists of 90-minute cycles including light, deep, and REM sleep.

⏰ Optimal wake-up

Waking up between cycles avoids morning grogginess and fatigue.

💤 Recommended duration

5-6 complete cycles (7h30-9h) for optimal restorative sleep.

🎯 Consistency

Going to bed and waking up at fixed times strengthens your natural body clock.

Tips for better sleep

🍽️ Diet & Nutrition

Avoid heavy meals 3 hours before bedtime. Choose chamomile or valerian teas. Limit caffeine after 2 PM and alcohol, which disrupts deep sleep.

🧘 Stress Management

Practice meditation or deep breathing before bed. Keep a journal to clear your mind. Create a relaxing routine 1 hour before sleep.

🛏️ Sleep Environment

Maintain temperature at 65-68°F (18-20°C). Invest in a quality mattress and pillows. Use blackout curtains and eliminate noise sources.

📱 Screens & Light

Avoid screens 1 hour before bedtime or use blue light filters. Prefer dim lighting in the evening. Get natural light exposure in the morning to regulate your body clock.

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