Find your best bedtime for tonight.
Calculate bedtime, wake-up time, sleep cycle options, and a practical wind-down routine you can follow before lights out.
Sleep Calculator
Choose a mode and adjust the details.
7-day plan
Turn tonight's result into a simple week.
Your current result suggests getting in bed around 11:15 PM and waking around 7:00 AM. The 7-day plan turns that timing into daily actions for consistency, screen timing, caffeine, naps, and morning reset.
Recommended sleep setup
Make the bedtime easier to follow
The calculator gives the time. Your room and evening cues make the plan easier to keep. Start with dimmer light, steadier sound, and a comfortably cool room.
Light
Dim lights 60 minutes before bed
Sound
Reduce noise or use steady background audio
Temperature
Keep the room comfortably cool
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Use the right tool for the next question
How this calculator works
Start with either a wake-up time or a bedtime. The calculator adds your estimated time to fall asleep and compares simplified 90-minute cycle estimates. Real sleep cycles commonly vary, so use the result as a practical starting point rather than an exact biological schedule.
Sleep latency
Your usual time to fall asleep is added as a buffer.
Sleep cycles
Compare 4, 5, and 6 estimated cycles; actual cycle length varies.
Routine timing
The wind-down plan starts before your recommended bedtime.
FAQ
What is a sleep calculator?+
It is a planning tool that estimates bedtime or wake-up time from a simplified sleep-cycle model and your usual time to fall asleep.
Is 7.5 hours of sleep enough?+
Sleep needs vary. Many adults are advised to get at least 7 hours, while this calculator uses cycle estimates only as a planning aid.
Can this diagnose insomnia?+
No. It is not a diagnostic tool. Persistent sleep problems should be discussed with a qualified professional.
What if I wake up during the night?+
Use the results as a starting point, then adjust your routine and environment. If the problem continues, consider professional guidance.