Every Sleep Calculator in One Place

Sleep debt calculator: find out how many hours of sleep you owe your body and get a step-by-step plan to repay it.

Sleep cycle calculator: find the optimal bedtime or wake time aligned with your 90-minute sleep cycles.

Wake-up time calculator: discover the best time to wake up based on when you go to sleep tonight.

Bedtime calculator: know exactly when to fall asleep based on your wake-up time and natural sleep cycles.

Sleep quality score calculator: get a personalized score for how restorative your sleep really is.

Sleep efficiency calculator: find your sleep efficiency percentage, the gold-standard sleep quality metric.

REM sleep calculator: find out how much REM sleep you get per night and whether it's enough for memory and mood.

Deep sleep calculator: find out how much slow-wave sleep you need, and estimate how much you're currently getting.

Circadian rhythm calculator: discover your ideal sleep-wake window and peak performance times by chronotype.

Optimal sleep window calculator: find the exact bedtime and wake time that align with your circadian rhythm.

Sleep hours by age calculator: find exactly how many hours of sleep you need, using the latest AASM and NSF guidelines.

Sleep pattern calculator: analyze your weekly sleep pattern, spot social jet lag, and get a personalized fix.

Nap optimizer calculator: find the perfect nap length for your goal, whether it's alertness, recovery, or creativity.

Caffeine cutoff calculator: find your ideal cutoff time so your afternoon coffee stops disrupting your sleep.

Screen time sleep impact calculator: see how evening screen use delays your sleep and lowers sleep quality.

Sleep recovery planner: get a multi-day, science-based plan to recover from accumulated sleep debt.

Weekly sleep planner: build a 7-day sleep schedule that actually matches your life and goals.

Insomnia self-assessment: take a clinically-inspired screener and find out if you may have chronic insomnia.

Melatonin dosage calculator: find the lowest effective dose and best timing for sleep onset or jet lag.

Sleep hygiene checklist: run a 20-point, evidence-based audit of your habits and get a personalized score.

Insomnia Severity Index test: take the clinically validated 7-question ISI and get a science-backed treatment pathway.

Sleep onset latency calculator: find out how long it takes you to fall asleep, and what that reveals about sleep pressure.

Biphasic sleep calculator: plan a science-backed split schedule with a shorter night and a strategic day nap.

Baby sleep calculator: find how much sleep your baby needs by age and build their ideal nap and night schedule.

Baby nap calculator: find the perfect nap times for your baby based on age and wake windows, protecting night sleep.

Work schedule sleep calculator: estimate how your shift pattern affects sleep opportunity and weekly sleep debt.

Why am I tired: answer that question with a quick diagnostic that finds the most likely reasons you're exhausted.

Sleep productivity loss calculator: quantify how much focus and output you're losing to poor sleep.

Life hours lost calculator: project cumulative under-rested waking hours from chronic under-sleeping over time.

Jet lag recovery calculator: estimate how long it'll take to adjust to a new time zone, and how to speed it up.

Sleep apnea risk screener: take a STOP-BANG-style screening for obstructive sleep apnea risk in under a minute.

Chronotype quiz: are you a Lion, Bear, Wolf, or Dolphin? Find your chronotype and your ideal daily schedule.

Sleep myth-buster quiz: test what you really know about sleep and bust 12 of the most common myths.

Sleep age calculator: discover how old your sleep habits make you biologically, based on duration and consistency.