Epworth Sleepiness Scale Calculator
Eight question daytime sleepiness score with the standard Epworth interpretation bands.
What it does
The Epworth Sleepiness Scale asks how likely you are to doze off in eight ordinary situations, from reading to sitting in traffic. Each answer scores 0 for never to 3 for a high chance, and the eight numbers add to a total between 0 and 24.
The scale was introduced by Dr Murray Johns in 1991 and has become one of the most used daytime sleepiness questionnaires in sleep medicine. It is short, it is free to use, and it produces a number that can be tracked over time or compared with a clinical threshold.
The questions focus on passive situations. That is deliberate: almost everyone can stay awake while driving or working, but the chance of dozing while reading or watching television reveals how much sleep pressure is present. Answer for your usual way of life over recent weeks, not for an unusually good or bad day.
Interpretation bands are widely used. Scores from 0 to 10 sit in the normal range, 11 to 14 suggest mild sleepiness, 15 to 17 moderate sleepiness, and 18 or more severe sleepiness. A score of 11 or higher is the usual threshold for flagging possible excessive daytime sleepiness.
A high score is not a diagnosis. It points toward a conversation with a clinician, who may ask about sleep duration, snoring, breathing pauses, shift work, medications, and mood. Conditions such as obstructive sleep apnea, narcolepsy, and insufficient sleep can all raise the number.
The result also has everyday uses. If you track the score month to month, changes can show whether a schedule change, a new mattress, or a treatment is helping. The scale is quick enough to repeat, and a single score is more meaningful next to the trend.
How to use
- Answer all eight situations for your recent typical weeks.
- Pick the chance of dozing that matches each one: never, slight, moderate, or high.
- Avoid answering for moments when you were especially rested or especially exhausted.
- Read the total out of 24 and the band it falls into.
- Compare with the 11 point threshold for excessive daytime sleepiness.
- Take the score to a clinician if it is 11 or higher or if it has risen over time.
Formula
- Score
- Total from 0 to 24 across the eight items.
- 0
- Would never doze.
- 1
- Slight chance of dozing.
- 2
- Moderate chance of dozing.
- 3
- High chance of dozing.
Every situation carries the same weight, so the bands are simple thresholds on the sum. The original scale is not divided into subscales and has no reverse scored items. Missing an item lowers the total, so answer all eight before reading the band.
Worked example
Example: an eight item set scoring 11
Defaults: reading 1, television 2, public place 1, passenger 1, afternoon rest 2, talking 1, after lunch 2, traffic 1.
- Add the eight answers: 1 + 2 + 1 + 1 + 2 + 1 + 2 + 1 = 11.
- The total sits in the 11 to 14 band.
- That band is labeled mild sleepiness.
- A score of 11 meets the usual threshold for excessive daytime sleepiness.
- Suggested step: consider a sleep evaluation.
- Tool shows 11 / 24, Mild sleepiness, and Consider a sleep evaluation.
Reference table
| Score | Band | Interpretation |
|---|---|---|
| 0 to 10 | Normal range | No sleepiness signal from this scale |
| 11 to 14 | Mild sleepiness | Consider a sleep evaluation |
| 15 to 17 | Moderate sleepiness | Discuss this score with a clinician |
| 18 to 24 | Severe sleepiness | Seek medical advice promptly |
Limits
- A screening score, not a diagnosis of any sleep disorder.
- Relies on your own memory of how often you doze.
- Does not capture sleep duration, snoring, or breathing pauses directly.
- Shift workers and people with unusual schedules may score differently for reasons the scale does not separate out.
Common mistakes
- Answering for a single unusual day instead of typical recent weeks.
- Treating a normal score as proof that sleep is healthy.
- Skipping items and reading the band from a partial total.
- Using the scale to compare yourself with someone else rather than to track your own change.
- Ignoring a score of 11 or higher because you feel used to being sleepy.
Try it yourself
Quick checks. Answers sit tucked under each question.
All eight answers at 2. What is the score?
16 out of 24, the moderate sleepiness band.
Answers of 3, 3, 2, 2, 1, 1, 0, 0?
12 out of 24, the mild sleepiness band.
All eight answers at 0?
0 out of 24, the normal range.
Questions
What is a normal Epworth score?
Scores from 0 to 10 sit in the normal range. From 11 upward the scale flags possible excessive daytime sleepiness, and 18 or more is the severe band.
What does a score of 11 mean?
Eleven is the usual threshold for excessive daytime sleepiness. It is a signal to look at sleep habits and consider a clinical evaluation, not a diagnosis by itself.
Can I use the scale to check for sleep apnea?
It can raise suspicion but cannot confirm apnea. Sleep apnea diagnosis needs a sleep study or a home sleep apnea test ordered by a clinician.
How often can I retake it?
The scale is short enough to repeat monthly or whenever your schedule changes. Trends over several weeks are more informative than a single reading.
Does medication affect the score?
Yes. Sedating medications, alcohol, and some medical conditions can raise the score. Mention any of these when discussing the result with a clinician.
Is the Epworth Scale free to use?
Yes. The scale is published openly for clinical and research use, and the eight questions with their scoring are reproduced here from the original 1991 paper.
Sources
- Harvard Division of Sleep Medicine: Epworth Sleepiness Scale
- Johns MW, A new method for measuring daytime sleepiness: the Epworth Sleepiness Scale, Sleep 1991
- Johns MW, full text via Oxford Academic