Wake-Up Time Calculator
If you fall asleep now, here's when you should wake up to feel refreshed.
4 cycles · 6.0h
05:15 AM
5 cycles · 7.5h
06:45 AM
6 cycles · 9.0h
08:15 AM
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Frequently asked questions
What's the best wake-up time?+
The best wake time is one that gives you 5–6 complete sleep cycles AND lands consistently within a 30-minute window every day, including weekends.
Is waking up at sunrise better?+
Yes — morning sunlight anchors your circadian rhythm, raises cortisol naturally, and makes evening melatonin release easier.
Should I snooze?+
No. Snooze fragments REM-rich morning sleep and increases sleep inertia. Set the latest possible alarm and get up immediately.
Why do I wake up at the same time every night?+
Your circadian rhythm fires cortisol pulses at predictable intervals. If you wake reliably at 3 AM, blood sugar drops, anxiety, or sleep apnea are the usual suspects.
Is it bad to wake up before sunrise?+
Not inherently — but pair early wakes with bright artificial light (10,000 lux) for 20 min to anchor your circadian clock when sun isn't available.
How long should I wait to drink coffee after waking?+
Wait 60–90 minutes. This lets cortisol peak naturally and prevents the early-afternoon caffeine crash.
Should I use a sunrise alarm clock?+
Yes — gradually brightening light over 30 minutes raises cortisol and reduces sleep inertia, especially in winter or windowless rooms.
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