Every Sleep Calculator in One Place

Calculate how many hours of sleep you owe your body and how to repay it.

Find the optimal bedtime or wake time aligned with your 90-minute sleep cycles.

Discover the best time to wake up based on when you go to sleep.

Know exactly when to fall asleep based on your wake-up time and sleep cycles.

Get a personalized score for the quality of your sleep based on key indicators.

Calculate your sleep efficiency percentage — the gold-standard sleep quality metric.

Calculate how much REM sleep you get per night and whether it's enough for memory, learning, and emotional health.

Find out how much deep sleep (slow-wave sleep) you need and how much you're likely getting based on your age and sleep duration.

Discover your personal circadian rhythm, ideal sleep-wake window, and peak performance times based on your chronotype and light exposure.

Calculate your personalised optimal sleep window — the exact bedtime and wake time that aligns with your circadian rhythm for deepest, most restorative sleep.

Find out exactly how many hours of sleep you need based on your age, using the latest AASM and NSF guidelines.

Analyse your weekly sleep pattern, identify irregularities and social jet lag, and get a personalised schedule to fix it.

Find the perfect nap length for your goal — alertness, recovery, or creativity.

Stop drinking coffee at the right time to protect your sleep.

See how evening screen time delays your sleep and reduces sleep quality.

Get a multi-day plan to recover from accumulated sleep debt.

Build a 7-day sleep schedule that matches your life and goals.

Take a clinically-inspired insomnia screener and find out if you may have chronic insomnia.

Find the lowest effective melatonin dose and timing for your goal — sleep onset or jet lag.

A 20-point evidence-based sleep hygiene audit with a personalized score.

Take the clinically validated 7-question ISI psychological test for insomnia. Get a severity score and a science-backed treatment pathway.

How long does it take you to fall asleep? Find out if your sleep onset latency is healthy and what it reveals about your sleep drive.

Plan a science-backed biphasic sleep schedule — a shorter night sleep plus a strategic daytime nap — for better alertness and productivity.

Calculate how much sleep your baby needs by age, find their ideal nap and nighttime schedule, and understand normal sleep development.

Find the perfect nap times for your baby based on age and wake windows. Build a consistent nap schedule that protects night sleep.

Diagnose the most likely reasons you're feeling exhausted.

Quantify how much focus and output you lose to poor sleep.

See how many waking years you lose to chronic under-sleeping.

Estimate how long it'll take to adjust to a new time zone — and accelerate it.

STOP-BANG-style screening for obstructive sleep apnea risk in under a minute.

Are you a Lion, Bear, Wolf, or Dolphin? Find your chronotype and ideal schedule.

Test what you really know about sleep — bust 12 of the most common myths.

Discover your 'sleep age' — how old your sleep health makes you biologically — based on your duration, quality, timing, and consistency.