Enter your desired wake-up time.
⏰ Includes 14 minutes to fall asleep. Adjust 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 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.
Handpicked based on sleep research and backed by thousands of verified reviews.
* We earn a small commission on qualifying purchases — at no extra cost to you. Learn more.
Small evening changes that compound into dramatically better sleep quality.
Keep your room between 60–67°F (15–19°C). Your core temperature must drop to initiate sleep.
Blue light suppresses melatonin by up to 50%. Stop screens 60 minutes before your target bedtime.
Caffeine's 5–7 hour half-life means a 3 PM coffee is 50% potent at 8 PM, blocking sleep signals.
10 minutes of sunlight within 30 minutes of waking anchors your circadian clock for the whole day.
A consistent 30-min pre-sleep routine (reading, journaling, stretching) signals your body to prepare for sleep.
Alcohol suppresses REM sleep — the most emotionally restorative stage — by up to 25% and fragments your night.
Everything about sleep cycles, our calculator, and waking up energized.