Calculate the perfect bedtime based on sleep cycles. Wake up refreshed by timing your sleep with your natural sleep cycles!
Keep your bedroom between 60-67°F (15-19°C) for optimal sleep. Cooler temperatures help initiate sleep.
Avoid screens 1-2 hours before bedtime. Use blue light filters or wear blue light blocking glasses.
No caffeine after 2 PM and limit alcohol 3 hours before bed as it disrupts sleep cycles.
Go to bed and wake up at the same time every day, even on weekends. Consistency reinforces sleep-wake cycle.
Calculates optimal sleep times based on 90-minute sleep cycles to wake up between cycles feeling refreshed.
Get multiple bedtime options for 3-6 sleep cycles so you can choose what works best for your schedule.
Adjust for how long it typically takes you to fall asleep (5, 15, or 30 minutes) for more accurate results.
See a visual breakdown of your sleep cycles including light sleep, deep sleep, and REM stages.
Works perfectly on all devices including smartphones, tablets, and desktop computers.
All calculations are done locally in your browser. Your data never leaves your computer.