Workday wake-up
Fix the alarm time first, then compare several evening options.
Direct answer · Sleep planning guide
What Time Should I Go to Bed? Use Your Wake Time to Plan It
The most useful bedtime starts with tomorrow’s fixed wake-up goal. Work backward by the amount of sleep you plan, then allow separate time to settle after getting into bed and a wind-down window before that. Use the calculator for exact clock times, and treat its cycle length as an adjustable reference rather than a measurement.
Use it in context
Two ways to apply the plan
One-night exception
Keep a special late night separate from the schedule you normally reuse.
Free planning tool
Runs in your browserBuild tonight’s timeline
Sleep cycles vary from person to person and across the night. We use 90 minutes as a planning reference, not a measurement of your actual sleep stages.
Your selected plan · 5 cycles
- Wind down
- Get into bed
- Aim to be asleep
- Wake-up goal
How we calculate
Start with the time that is fixed for tomorrow. The calculator works backward or forward using your selected planning duration, the time you usually need to settle, and a separate wind-down window.
BedtimePilot uses adjustable cycle timing as a planning reference. Actual sleep architecture varies by person and night, and this tool does not measure sleep stages.
Important limitations
Results are planning estimates based on your times and adjustable settings. They do not detect sleep stages and are not medical advice. Do not reduce your sleep opportunity just to match a cycle count. Seek professional care for persistent sleepiness or sleep-health concerns.
Scientific references
Last reviewed
Reviewed for calculation logic, source links, and non-medical product claims.
Questions
What to know before using the result
Is a sleep cycle always 90 minutes?
No. Ninety minutes is an adjustable planning reference here. Cycle length and sleep architecture vary by person and from night to night.
Does this calculator detect REM or deep sleep?
No. It creates a schedule from clock times and planning assumptions. It does not measure or detect any sleep stage.
Can I change the assumptions?
Yes. You can adjust the cycle reference, number of cycles, time to fall asleep, and wind-down duration before saving a result.
Try the result tonight
Once the timing fits, save the full evening timeline in BedtimePilot for reuse.
Save the plan