The Epworth Sleepiness Scale: Test Your Daytime Sleepiness

ByJeremy Smith Updated on

When I was first diagnosed with sleep apnea, I had no idea there was a simple questionnaire that doctors often use to measure daytime sleepiness. It’s called the Epworth Sleepiness Scale (ESS), and while it’s not a diagnosis on its own, it can be an important step toward recognizing a sleep disorder.

Epworth Sleepiness Scale

I’ve researched this test so I could break it down in plain English for anyone who, like me, might have heard about it but isn’t sure what it really means.

What Is the Epworth Sleepiness Scale?

The Epworth Sleepiness Scale is a quick, eight-question test developed by sleep researcher Dr. Murray Johns in 1991. It’s designed to measure your general level of daytime sleepiness — essentially, how likely you are to doze off in different everyday situations.

Doctors and sleep specialists use it as a screening tool. A high score may indicate that you’re not getting restorative sleep, and one possible cause could be sleep apnea.

👉 If you’re new to sleep apnea, I recommend checking out my Beginner’s Guide to Sleep Apnea for a full breakdown of symptoms, causes, and treatment options.

Try the Epworth Sleepiness Scale

Answer honestly — think about your usual way of life, not just how you feel today. It only takes a couple of minutes.

See How You Score

Answer the 8 quick questions below to measure your level of daytime sleepiness. Your score may help you decide whether to talk with a doctor about a home sleep apnea test .

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Note: The Epworth Sleepiness Scale is a screening tool, not a diagnosis.

(function(){ const questions=[ “Sitting and reading”,”Watching TV”, “Sitting inactive in a public place”, “As a passenger in a car for an hour”, “Lying down to rest in the afternoon”, “Sitting and talking to someone”, “Sitting quietly after lunch”, “In a car, stopped in traffic” ]; const labels=[{v:0,t:”0 · Never”},{v:1,t:”1 · Slight”},{v:2,t:”2 · Moderate”},{v:3,t:”3 · High”}]; const form=document.getElementById(‘ess-form’); const output=document.getElementById(‘ess-output’); questions.forEach((q,i)=>{ const fs=document.createElement(‘fieldset’); fs.className=’ess-card’; fs.innerHTML=`
${i+1}. ${q}
`; const opts=document.createElement(‘div’); opts.className=’ess-options’; labels.forEach(l=>{ opts.innerHTML+=` `; }); fs.appendChild(opts); form.appendChild(fs); }); document.getElementById(‘ess-calc’).onclick=()=>{ let total=0; for(let i=0;i<8;i++){ const sel=form.querySelector(`input[name="q${i}"]:checked`); if(!sel){output.style.display='block';output.textContent="Please answer all 8 questions.";return;} total+=+sel.value; } output.style.display='block'; output.innerHTML=`Your Epworth score: ${total} / 24`; }; document.getElementById(‘ess-reset’).onclick=()=>{form.reset();output.style.display=’none’;}; })();

How to Interpret Your Score

The ESS score ranges from 0 to 24. The higher the number, the sleepier you are during the day. Here’s how most clinicians interpret it:

  • 0–7 = Normal: You’re unlikely to have abnormal sleepiness.
  • 8–9 = Mild Sleepiness: Keep an eye on your symptoms. If they worsen, consider seeing a doctor.
  • 10–15 = Excessive Sleepiness: This may be a sign of a sleep disorder such as sleep apnea. A home sleep apnea test could be the next step.
  • 16–24 = Severe Sleepiness: Strong indication that something is off. This level of sleepiness can impact daily life and safety — especially when driving. Please talk to a healthcare professional.

When I finally did a sleep study, my Epworth score was way above normal. It helped my doctor push for testing, which confirmed I had severe obstructive sleep apnea. Looking back, I wish I’d known about this test sooner — it would have explained why I was constantly foggy and exhausted.

Why This Test Matters

Daytime sleepiness isn’t just about being tired. It can affect work, memory, mood, and even safety. Studies show that excessive sleepiness increases the risk of car accidents and workplace errors.

If your score is high, it doesn’t necessarily mean you have sleep apnea — but it’s a red flag that should prompt a conversation with your doctor.

Limitations of the Epworth Sleepiness Scale

While the ESS is simple and widely used, it’s not perfect:

  • It’s subjective — based on your perception, not hard measurements.
  • It doesn’t track brain waves, oxygen levels, or breathing interruptions.
  • It’s mainly useful for spotting obstructive sleep apnea (OSA), not central sleep apnea or other sleep disorders.

That’s why many people who score high on the ESS are referred for a formal sleep study. Sometimes it’s done in a clinic, but more often these days, you can take one from the comfort of your own home.

Frequently Asked Questions

Q: Can I take the Epworth Sleepiness Scale at home?
A: Yes. In fact, it’s designed to be self-administered. Just remember it’s a screening tool, not a diagnosis.

Q: What score suggests sleep apnea?
A: Scores of 10 or higher indicate excessive daytime sleepiness, which may be caused by sleep apnea or another sleep disorder.

Q: How often should I retake it?
A: Many people retake it every few months, especially after starting CPAP therapy, to track improvements.

Q: Is the test used worldwide?
A: Yes. It’s one of the most common sleepiness screening tools and has been validated in multiple countries and languages.

Q: What if I score high but don’t feel sleepy?
A: Sometimes people underestimate their sleepiness, while others overestimate it. That’s why it’s best to discuss your results with a sleep specialist.

Final Thoughts

The Epworth Sleepiness Scale is quick, simple, and free — but it can be an eye-opener. For me, it explained years of unexplained tiredness and helped confirm I needed testing.

If you score high, don’t ignore it. Talk to your doctor and ask whether a home test or an in-lab study is right for you. The sooner you take action, the sooner you’ll get back to mornings with energy and nights of real, restorative sleep.

👉 Want to learn more? Start with my Beginner’s Guide to Sleep Apnea.

⚠️ MEDICAL DISCLAIMER This blog provides general information only and is not a substitute for professional medical advice, diagnosis, or treatment. Sleep apnea is a serious condition, and CPAP equipment should be used under proper medical supervision. Always consult your doctor or sleep specialist before starting, stopping, or changing any therapy. I share personal experiences as a CPAP user, not as a medical professional. Individual results vary. For medical guidance, please consult a qualified clinician or the American Academy of Sleep Medicine (aasm.org).

Jeremy shares real-world experience with CPAP machines, masks, cleaning routines, travel tips, and emotional support. His writing combines firsthand insight with clear, helpful guidance for others living with sleep apnea.

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