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Fatigue Severity Scale (FSS-9)3

Fatigue Severity Scale (FSS-9) Test

Understand how much chronic fatigue affects daily life in about 2 minutes. Fast, research-backed results help guide care and track progress over time.

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Questions: 92 minutes

08:30

October 2, 2025

October 2, 2025
Material has been updated

October 2, 2025
Material has been published

30,116 views

3,190 completions

2,676 likes

Verified by Daniel Hall

Psychologist with 25 years of experience

Scale Explorer

How the Scales are Structured

example score

31/63

Chronic Fatigue Scale (CFS)

Measures how strongly fatigue interferes with daily functioning and activity over recent time.

Low fatigue impact

Moderate fatigue impact

High fatigue impact

9 – 27: Low fatigue impact | 28 – 45: Moderate fatigue impact | 46 – 63: High fatigue impact

A score of 31 falls in the Moderate fatigue impact range, suggesting fatigue is noticeably affecting day-to-day activities but not at the most severe level.

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DATA-BASED USER COHORTS

Who Usually Takes This Test?

Unexplained daily exhaustion

41%OF USERS

People who feel persistently drained and want to see how much fatigue is interfering with work, home, and social life.

Chronic illness monitoring

34%OF USERS

People with conditions like multiple sclerosis or post-viral syndromes who track fatigue severity over time and during treatment changes.

Mood and sleep concerns

25%OF USERS

People dealing with depression, stress, insomnia, or burnout who want to check whether fatigue is a major part of their symptoms.

BASED ON AGGREGATED, ANONYMIZED DATA FROM TENS OF THOUSANDS OF FREUDLY USERS.

Benchmarking

See How You Compare

Once you complete the test, your results are compared with real-world data from people in your country.
Below is a preview of how scores are typically distributed across each scale.

Chronic Fatigue Scale (CFS)

Average

41.5

Normal range

34.7 — 48.4

min.

max.

This curve shows how scores are typically distributed.
Once you complete the test, your result will appear on the scale so you can see how you compare.

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SAMPLE QUESTIONS

Example Questions From the Test

Please rate each statement according to how well it reflected your well-being over the past week.

- Strongly disagree
- Disagree
- Mostly disagree
- Neither agree nor disagree
- Mostly agree
- Agree
- Strongly agree
- Strongly disagree
- Disagree
- Disagree somewhat
- Neither agree nor disagree
- Agree somewhat
- Agree
- Strongly agree
- Strongly disagree
- Disagree
- Mostly disagree
- Neither agree nor disagree
- Mostly agree
- Agree
- Strongly agree

These are 3 of the 9 real questions — the rest appear in the test. No sign-up needed to start.

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WHAT THE TEST MEASURES

About This Assessment

Fatigue Severity Scale (FSS-9) Test - Symptoms and Signs

fatigue

This measure is used to quantify the functional impact of fatigue in daily life. The Fatigue Severity Scale (FSS-9) provides a brief, standardized self-report of perceived fatigue severity over a recent period.

It consists of 9 items rated on a 7-point scale, yielding an average score that supports clinical interpretation and longitudinal monitoring. Administration typically takes about 2 minutes. The scale was developed by Lauren B. Krupp and Nancy G. LaRocca.

The Fatigue Severity Scale (FSS-9) is commonly used in clinical and research settings to characterize fatigue-related impairment and to track change over time (e.g., in response to treatment or changes in health status). Results should be interpreted in the context of the individual’s medical, psychiatric, and functional history and are not diagnostic on their own.

Author: Lauren B. Krupp, Nancy G. LaRocca

Literature: Krupp, L. B., LaRocca, N. G., Muir-Nash, J., & Steinberg, A. D. The fatigue severity scale: Application to patients with multiple sclerosis and systemic lupus erythematosus. Archives of Neurology. 1989.; Piper, B. F., Dibble, S. L., Dodd, M. J., Weiss, M. C., Slaughter, R. E., & Paul, S. M. The revised Piper Fatigue Scale: Psychometric evaluation in women with breast cancer. Oncology Nursing Forum. 1998.