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

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08:30

October 2, 2025

October 2, 2025
Material has been updated

October 2, 2025
Material has been published

27,257 views

2,896 completions

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Verified by Daniel Hall

Psychologist with 25 years of experience

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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.

RESULTS YOU CAN ACTUALLY USE

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Get insights on behavioral and thought patterns you might not notice on your own. By uncovering subtle connections between your responses, you’ll better understand what may be driving your current results.

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Used in 52+ countries

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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.

Majority

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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CLEAR ANSWERS TO COMMON QUESTIONS

Frequently Asked Questions

What does this questionnaire measure?

It measures how much fatigue interferes with everyday functioning. It focuses on the impact of fatigue rather than specific medical causes.

How is it scored?

Each of the 9 statements is rated from 1 to 7, with higher numbers indicating greater interference from fatigue. The final score is the average of the 9 ratings.

What time period should responses consider?

Responses should reflect fatigue over the recent period, based on typical day-to-day experience. Use an overall impression rather than a single unusual day.

How should the 1 to 7 rating scale be used?

Select 1 when fatigue has little or no effect on the statement and 7 when fatigue has a severe effect. Choose numbers between 1 and 7 to match the degree of impact.

How should the results be interpreted?

Higher average scores indicate more severe fatigue-related limitations in daily life. Results are used to support screening and monitoring over time, along with clinical evaluation.

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.

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