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.

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.

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.