WOMAC — Western Ontario and McMaster Universities Arthritis Index

Calculates the WOMAC arthritis index from three subscales: Pain (5 items), Stiffness (2 items), and Physical Function (17 items). Likert version: 0–4 per item. Higher scores = worse function. Total score 0–96 (Likert) or 0–240mm (VAS). Used in hip and knee OA.

Weight
Height
Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How It Works

Calculates the WOMAC arthritis index from three subscales: Pain (5 items), Stiffness (2 items), and Physical Function (17 items). Likert version: 0–4 per item. Higher scores = worse function. Total score 0–96 (Likert) or 0–240mm (VAS). Used in hip and knee OA

Each component has a specific meaning:

  • Three subscales: Pain — The three subscales: pain recorded for the scenario being assessed.
  • Stiffness — The stiffness recorded for the scenario being assessed.
  • Physical Function — The physical function recorded for the scenario being assessed.

Note: Interpret the womac result against the thresholds and context described above.

How to Use

Enter the three subscales: Pain, Stiffness, Physical Function for the scenario you are assessing. Calculates the WOMAC arthritis index from three subscales: Pain (5 items), Stiffness (2 items), and Physical Function (17 items). Likert version: 0–4 per item. Higher scores = worse function. Total score 0–96 (Likert) or 0–240mm (VAS). Used in hip and knee OA. Use the womac result to inform your calculation.

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Frequently Asked Questions