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Fatigue Severity Scale Calculator — result sheet
Calculate the nine-response Fatigue Severity Scale total and mean from responses entered on the official or authorized form, with a clear boundary between arithmetic and clinical interpretation.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: FSS total = response 1 + response 2 + response 3 + response 4 + response 5 + response 6 + response 7 + response 8 + response 9; FSS mean = total ÷ 9; possible total range = 9–63.
The calculator accepts the nine numerical responses without reproducing the questionnaire wording, then exposes both the sum and the per-item mean. It is an arithmetic companion to the official or authorized form, not a diagnosis and not a universal cutoff finder.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- FSS response 1 — 7 choices
- FSS response 2 — 7 choices
- FSS response 3 — 7 choices
- FSS response 4 — 7 choices
- FSS response 5 — 7 choices
- FSS response 6 — 7 choices
- FSS response 7 — 7 choices
- FSS response 8 — 7 choices
- FSS response 9 — 7 choices
Worked example
| Input | Value |
|---|---|
| FSS response 1 | 4 |
| FSS response 2 | 4 |
| FSS response 3 | 4 |
| FSS response 4 | 4 |
| FSS response 5 | 4 |
| FSS response 6 | 4 |
| FSS response 7 | 4 |
| FSS response 8 | 4 |
| FSS response 9 | 4 |
FSS total = 36 points and FSS mean = 4 points per item.
Assumptions and limits
- The visitor is using the current official or authorized Fatigue Severity Scale form and enters the responses in its order.
- Each response is an integer from 1 through 7 on the published agreement scale.
- The total is the unweighted sum of the nine responses.
- The mean is the total divided by exactly nine completed responses.
- A numerical result does not identify the cause of fatigue or measure safety for work, driving, or exercise.
- The page does not infer a clinical threshold because interpretation depends on the instrument version and clinical context.
- Sleep, medicines, mood, medical conditions, workload, pain, and recent illness are outside this arithmetic.
- A clinician or qualified health professional should interpret concerning symptoms, trends, or decisions about care.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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