The following ten statements refer to how you usually feel. Per statement you can choose one out of five answer categories, varying from Never to Always. Please choose the answer to each question that is applicable to you. (Fatigue Assessment Scale)

In the last month:
- 1. I am bothered by fatigue
- 2. I get tired very quickly
- 3. I don’t do much during the day
- 4. I have enough energy for everyday life
- 5. Physically, I feel exhausted
- 6. I have problems to start things
- 7. I have problems to think clearly
- 8. I feel no desire to do anything
- 9. Mentally, I feel exhausted
- 10. When I am doing something, I can concentrate quite well

Your fatigue score =



This test should be used only as a guidance; it is not a substitute for professional medical advice.

Score Interpretation

Total Score

Perceived Fatigue Level

10- 21




Over 35



The Fatigue Assessment Scale (FAS) is a 10-item self-report scale evaluating symptoms of chronic fatigue. The FAS treats fatigue as a unidimensional construct and does not separate its measurement into different factors.


The total score ranges from 10 to 50, with a higher score indicating more severe fatigue.

A normative percentile for the total score is calculated based on an adult sample (Michielsen et al., 2003), indicating how the respondent scored in relation to a typical pattern of responding for adults. For example, a percentile of 90 indicates the individual has more fatigue than 90 percent of the normal population.

Scores above 22 represent significant fatigue (De Vries et al., 2004), which corresponds to a normative percentile of 65. A horizontal dotted line is indicated on the Total Percentile graph for this cutoff score.

A description of the fatigue experienced is presented for the total score where:

  • less than 22 indicates “normal” (i.e. healthy) levels of fatigue
  • between 22 and 34 indicates mild-to-moderate fatigue
  • 35 or more indicates severe fatigue (Hendricks et al., 2018).

There are two subscales:

  1. Mental fatigue (sum of items 3, 6, 7, 8, and 9) – a measure of the cognitive impacts of fatigue for the client (e.g. lack of motivation, problems beginning tasks, problems thinking).
  2. Physical fatigue (sum of items 1, 2, 4, 5 and 10) – a measure of the physical impacts of fatigue for the client (e.g. physical exhaustion, lack of energy).
De Vries, Michielsen H, Van Heck GL, Drent M. Measuring fatigue in sarcoidosis: the Fatigue Assessment Scale (FAS). Br J Health Psychol 2004; 9: 279-91.


Michielsen, H. J., De Vries, J., & Van Heck, G. L.

Michielsen, H. J., De Vries, J., and Van Heck, G. L. (2003), Perelman School of Medicine, University of Pennsylvania.