How to use this quiz
Answer 6 questions on sleep duration, schedule consistency, sleep latency, night wakings, daytime energy, and caffeine reliance. The quiz counts good signals across duration, consistency, energy, and caffeine. Be honest about consistency — varying your bedtime by 3+ hours on weekends ("social jetlag") disrupts your circadian rhythm even if the total hours look fine. The caffeine question matters because heavy use often masks rather than fixes sleep debt.
What your result means
Four good signals means sleep is on track. The most concerning pattern is short sleep (under 6 hours) combined with exhaustion or caffeine dependency — that points to chronic sleep deprivation, not a willpower problem. Two-to-three good signals means specific levers (consistency, earlier bedtime, or cutting afternoon caffeine) will move the needle. Norms to anchor against: adults need 7-9 hours, sleep latency of 10-20 minutes is normal, and one brief nighttime waking is common; frequent waking, lying awake over 30 minutes, or being unable to fall asleep under 5 minutes all flag a problem worth addressing.
When to trust it
Self-assessed sleep quality is notoriously unreliable — most people underestimate their deficit. If you've improved sleep hygiene for 2-3 weeks without change, see a healthcare provider to screen for sleep apnea (especially if you snore or wake gasping), chronic insomnia, or restless leg syndrome. Sleep apnea in particular can leave someone "sleeping" 8 hours with severe untreated deprivation; it requires a sleep study to diagnose, not a quiz.
Frequently Asked Questions
How much sleep do I actually need?
Adults: 7-9 hours is the evidence-based range, with genuine individual variation inside it — a small minority thrives near 6.5, some need 9. Your real test is daytime function: waking without an alarm feeling rested, not needing caffeine to function before noon, and not crashing hard on weekends. If you regularly need an alarm plus two snoozes and weekend catch-up sleep, you're under-sleeping your personal requirement.
Do naps make up for missed sleep?
Partially. A 20-minute nap restores alertness and performance impressively well, and a full 90-minute cycle can replace some deep and REM sleep. What naps don't restore: the consolidated overnight architecture that supports hormonal regulation and long-term health. Naps are an excellent patch for an occasional short night; if you structurally need daily naps to function, the underlying deficit is the problem to fix.
Is 6 hours of sleep enough if I feel fine?
Almost certainly not. The consistent research finding is that chronic 6-hour sleepers subjectively adapt — they stop feeling sleepy — while their reaction time, memory consolidation, and immune markers keep declining. You can't feel your own impairment; that's the trap. One well-known study found people restricted to 6 hours for two weeks performed like people who'd been awake for 24 hours, while rating themselves as barely sleepy. Trust duration and function, not the feeling.