The Epworth Sleepiness Scale (ESS) is a validated 8-item questionnaire developed by Dr. Murray Johns that measures how likely you are to doze off in common everyday situations. Scores range from 0 to 24, with higher scores indicating greater levels of daytime sleepiness. Clinicians widely use the ESS to screen for excessive daytime sleepiness, obstructive sleep apnea (OSA), and other sleep disorders. A score above 10 is considered clinically significant.
Screening tool only — not a diagnosis. A high ESS score suggests excessive daytime sleepiness that warrants evaluation by a healthcare provider. Only a qualified clinician can diagnose sleep apnea or other sleep disorders. If you snore loudly, wake gasping, or have been told you stop breathing during sleep, see a doctor.
Epworth Sleepiness Scale Questionnaire
How likely are you to doze off or fall asleep in the following situations?
1 Sitting and reading
2 Watching TV
3 Sitting inactive in a public place (e.g., a theater or meeting)
4 As a passenger in a car for an hour without a break
5 Lying down to rest in the afternoon when circumstances permit
6 Sitting and talking to someone
7 Sitting quietly after lunch without alcohol
8 In a car, while stopped for a few minutes in traffic
How to Use the Epworth Sleepiness Scale Calculator
The Epworth Sleepiness Scale is the most widely used tool for measuring daytime sleepiness in clinical and research settings. Developed by Dr. Murray Johns in 1991, it asks you to rate your chance of dozing in eight everyday situations — from sitting and reading to stopping in traffic. This free calculator scores your answers instantly and maps them to a clinically recognized severity level.
Step 1: Answer all 8 situations honestly
For each situation, pick the answer that best describes your usual behavior in recent times — even if you haven't actually been in that situation lately. Think about how likely you would be to doze off, not just how tired you feel. Use the scale: 0 = would never doze, 1 = slight chance, 2 = moderate chance, 3 = high chance.
Step 2: Watch your score update in real time
As you select each answer, your total ESS score updates automatically in the live banner at the top. You'll also see a colored progress bar showing where you stand across the five severity zones: lower normal, higher normal, mild excessive, moderate excessive, and severe excessive daytime sleepiness.
Step 3: Review your results
Once you've answered all 8 questions, a full results panel appears with your score, severity level, a detailed interpretation, and a sleep apnea risk note if your score is elevated. Scores of 11 or higher indicate excessive daytime sleepiness that warrants further evaluation by a healthcare provider.
Understanding your ESS score
The ESS total ranges from 0 to 24. Most healthy adults score between 2 and 10. A score of 6–10 is considered within the higher normal range and may not require action. Scores of 11–12 suggest mild excessive daytime sleepiness; 13–15 indicates moderate; and 16–24 indicates severe. High scores — especially above 15 — are associated with increased risk of obstructive sleep apnea (OSA), narcolepsy, and other sleep disorders that affect concentration, mood, and safety.
When to see a doctor
Consider seeing a sleep specialist or your primary care physician if your Epworth Sleepiness Scale score is above 10, if you snore loudly, have been observed to stop breathing during sleep, wake up with headaches, or feel unrefreshed after a full night of sleep. These symptoms together suggest obstructive sleep apnea, which is treatable and, if left unmanaged, can increase cardiovascular risk.
FAQ
Is this Epworth Sleepiness Scale tool free to use?
Yes, this ESS calculator is completely free with no account or signup required. You can use it as many times as needed. All processing runs locally in your browser — no data is ever sent to a server.
Is my data safe and private?
Yes, all your answers and scores are processed entirely in your browser using client-side JavaScript. No responses, scores, or personal information are ever transmitted or stored. When you close the page, everything is gone.
What is the Epworth Sleepiness Scale?
The Epworth Sleepiness Scale (ESS) is a validated 8-item self-report questionnaire developed by Dr. Murray Johns in 1991 at Epworth Hospital in Melbourne, Australia. It measures a person's general level of daytime sleepiness by asking how likely they are to doze off in eight common everyday situations. Scores range from 0 to 24.
What do the ESS score ranges mean?
Scores 0–5 indicate lower normal daytime sleepiness, 6–10 indicate higher normal daytime sleepiness, 11–12 indicate mild excessive daytime sleepiness, 13–15 indicate moderate excessive daytime sleepiness, and 16–24 indicate severe excessive daytime sleepiness. Scores above 10 are generally considered clinically significant and warrant further evaluation.
Can the ESS diagnose sleep apnea?
No. The ESS is a screening tool that identifies excessive daytime sleepiness — a common symptom of obstructive sleep apnea (OSA) — but it cannot diagnose sleep apnea or any other sleep disorder. Diagnosis requires a formal sleep study (polysomnography) or home sleep apnea test ordered by a qualified clinician.
What ESS score suggests I should see a doctor?
An ESS score above 10 suggests excessive daytime sleepiness that warrants evaluation by a healthcare provider. Scores of 16 or higher indicate severe sleepiness and should prompt prompt medical attention. If you also snore loudly, wake up gasping, or have been told you stop breathing during sleep, see a doctor regardless of your ESS score.
How is the Epworth Sleepiness Scale different from the Pittsburgh Sleep Quality Index?
The ESS specifically measures daytime sleepiness by rating the chance of dozing in eight situations. The Pittsburgh Sleep Quality Index (PSQI) is a broader tool that evaluates overall sleep quality, duration, disturbances, and daytime dysfunction over the past month. They measure different aspects of sleep health and are often used together in clinical practice.
Can caffeine or medications affect my ESS score?
Yes. Stimulants like caffeine can mask daytime sleepiness and may lead to an artificially low ESS score. Conversely, sedating medications (antihistamines, certain blood pressure drugs, some antidepressants) can elevate your score. Answer based on how you typically feel in your current daily life, and let your doctor know about any medications when reviewing your results.