Sleep smarter. Our sleep calculator helps you find the perfect time to go to bed or wake up based on sleep cycle science, ensuring you don't wake up in the middle of deep sleep.
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Sleep Calculator - Optimal Wake & Bed Times - FusioFiles
Wake up feeling refreshed by timing your sleep with 90-minute REM cycles. Fast, free, and 100% private. All processing happens locally.
6 Cycles
09:46 PM
9 hours of sleep
5 Cycles
Recommended11:16 PM
7.5 hours of sleep
4 Cycles
12:46 AM
6 hours of sleep
3 Cycles
02:16 AM
4.5 hours of sleep
How to use Sleep Calculator
1
Set Wake Time
Enter the time you need to wake up in the morning.
2
Analyze Cycles
The tool works backwards through 90-minute sleep cycles.
3
Set Alarm
Pick one of the recommended bedtime options to wake up refreshed.
Key Features
Frequently Asked Questions
A sleep cycle is a 90-minute block of time your brain needs for deep rest. Waking up at the end of a cycle helps you feel fresh.
Just pick the time you want to wake up, and we will tell you the best times to go to bed.
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