Calculate your level of sleepiness


Healthy adults may experience sleepiness at their normal bedtime or even mid-afternoon. Daytime sleepiness is considered excessive when it occurs at unusual times.

Excessive daytime sleepiness directly affects the individual and also those close to him or her. Sleepiness can have serious consequences, be it personal, family or professional.

Epworth Sleepiness Scale

Sleepiness can be measured objectively in the laboratory and subjectively by autoquestionnaire. Objective sleepiness is measured by the maintenance of wakefulness test (MWT) and requires polysomnography. Usually, subjective sleepiness is measure by the Epworth Sleepiness Scale (ESS). The ESS is a simple and short duration tool assessing the probability of falling asleep in various situations. ESS score may decrease with appropriate positive pressure treatment.

How likely are you to doze off or fall asleep during the following situations, in contrast to just feeling tired? If a situation never or rarely occurs, give your best guess for that situation.

Sleepness Scale (1 to 3) :

0 = would never doze 1 = slight chance of dozing
2 = moderate chance of dozing 3 = high chance of dozing

Probability of falling asleep : 0 1 2 3
While sitting and reading
While watching television
Sitting, inactive in a public place (for example a theatre or a meeting)
While riding as a passenger in a car for an hour or more without stopping
While lying down to rest in the afternoon, as circumstances permit
While sitting talking to someone
While sitting calmly after a meal that did not include alcohol
While at the steering wheel when stuck in traffic


Krieger J. Assessment of the sleepy patient in Breathing disorders in sleep, 18-28, McNicholas WT and Phillipson EA editors. Saunders WB, 2002.

Johns MW. A new method for measuring daytime sleepiness: the Epworth sleepiness scale. Sleep. 1991; 14(6):540-5.