Fibromyalgia Calculator (2010 ACR Criteria)

Widespread Pain Index (WPI) Mark every region where you have had pain in the past week. Score: 1 point per region, max 19.

Check each body region where the patient has had pain or tenderness over the past week. Each region scores 1 point regardless of pain severity. The WPI captures the distribution of pain, not its intensity.

WPI Score

of 19 possible

Symptom Severity Scale (SSS) Rate fatigue, unrefreshed sleep, and cognitive symptoms (0-3 each); estimate somatic burden (0-3). Max 12.

Part A — Core Symptom Severity (0-9)

For each symptom below, rate the severity over the past week using the 4-point scale. These three items together score 0-9 and reflect the cardinal non-pain symptoms of fibromyalgia.

Fatigue

General tiredness or exhaustion not fully explained by activity level or poor sleep quality alone

Waking Unrefreshed

Feeling that sleep was non-restorative; waking feeling as tired as before sleep, or having difficulty feeling rested despite adequate hours

Cognitive Symptoms ("Fibro Fog")

Difficulty with thinking, concentration, memory, or word-finding; problems with mental clarity or speed of thought

Part A Score

of 9 possible

Part B — Somatic Symptom Burden (0-3)

Physician's estimate of the extent of somatic symptoms. Based on a review of 41 possible somatic symptoms including headaches, IBS, muscle weakness, Raynaud's phenomenon, tinnitus, dizziness, and others. Select the category that best describes the overall somatic burden.

Part B Score

of 3 possible

Symptom Duration Symptoms must be present at a similar level for at least 3 months

Have symptoms been present at a similar level for at least 3 months?

This requirement ensures fibromyalgia is a chronic persistent condition, not an acute illness. Episodic or recent-onset symptom clusters do not meet criteria.

2010 ACR Criteria — Classification thresholds

Condition	Threshold
Option A	WPI ≥7 AND SSS ≥5
Option B	WPI 3-6 AND SSS ≥9
Duration	Symptoms ≥3 months
FS Severity Score	WPI + SSS (0-31)
FS interpretation	0-12 mild; 13-19 moderate; 20-31 severe

Frequently Asked Questions

WPI

/ 19

SSS

/ 12

Fibromyalgia Severity (FS) Score

WPI + SSS combined (0-31)

0FS Score — 31 max

Complete all sections

Enter WPI, SSS, and symptom duration to evaluate criteria

Score Breakdown

Widespread Pain Index (WPI)0 / 19

Fatigue severity0 / 3

Waking unrefreshed0 / 3

Cognitive symptoms0 / 3

Somatic symptom burden0 / 3

Duration ≥3 months—

Fibromyalgia Calculator — 2010 ACR Criteria

Frequently Asked Questions

Score Breakdown