Enter your desired wake-up time to find optimal bedtimes.
⏰ Includes 14 minutes to fall asleep. Adjust mentally if you doze off faster or slower.
Calculate your perfect bedtime or wake-up time based on natural 90-minute sleep cycles. Wake up at the right moment — refreshed every morning.
⏰ Includes 14 minutes to fall asleep. Adjust mentally if you doze off faster or slower.
Your brain cycles through 4 distinct stages roughly every 90 minutes. Waking at the end of a cycle is the secret to feeling energized.
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Tiny adjustments to your evening routine can compound into dramatically better sleep quality within days.
Keep your room between 60–67°F (15–19°C). Your core temperature must drop to initiate sleep — a cool room accelerates this natural process significantly.
Blue light from phones and TVs suppresses melatonin by up to 50%. Stop all screens at least 60 minutes before your target bedtime — use the time to read or stretch.
Caffeine has a 5–7 hour half-life. A 3 PM coffee still has 50% of its stimulant effect at 8 PM, actively blocking the adenosine that makes you sleepy.
Get 10 min of natural sunlight within 30 minutes of waking. This anchors your circadian clock and naturally triggers sleepiness at the right time each night.
A consistent 30-min pre-sleep routine (reading, journaling, light stretching) signals your nervous system that sleep is approaching, cutting sleep onset time in half.
Alcohol may help you fall asleep but fragments the second half of your night and suppresses REM sleep — the most emotionally restorative stage — by up to 25%.
Everything you need to know about sleep cycles, our calculator, and waking up energized.