Functional Ambulation Categories (FAC)

Classifies walking ability using the Functional Ambulation Categories (FAC), a 6-level scale: 0 (non-ambulatory/complete assistance needed), 1 (continuous manual support), 2 (intermittent support or guarding), 3 (supervision only), 4 (independent on level surfaces), 5 (fully independent including stairs, inclines, and uneven terrain).

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

Classifies walking ability using the Functional Ambulation Categories (FAC), a 6-level scale: 0 (non-ambulatory/complete assistance needed), 1 (continuous manual support), 2 (intermittent support or guarding), 3 (supervision only), 4 (independent on level surfaces), 5 (fully independent including stairs, inclines, and uneven terrain)

Each component has a specific meaning:

  • Functional Ambulation Categories — The functional ambulation categories recorded for the scenario being assessed.
  • 6-level scale: 0 — The 6-level scale: 0 recorded for the scenario being assessed.
  • 1 — The 1 recorded for the scenario being assessed.
  • 2 — The 2 recorded for the scenario being assessed.
  • 3 — The 3 recorded for the scenario being assessed.
  • 4 — The 4 recorded for the scenario being assessed.

Note: Interpret the functional ambulation categories result against the thresholds and context described above.

How to Use

Enter the Functional Ambulation Categories, 6-level scale: 0, 1, 2, 3, 4 for the scenario you are assessing. Classifies walking ability using the Functional Ambulation Categories (FAC), a 6-level scale: 0 (non-ambulatory/complete assistance needed), 1 (continuous manual support), 2 (intermittent support or guarding), 3 (supervision only), 4 (independent on level surfaces), 5 (fully independent including stairs, inclines, and uneven terrain). Use the functional ambulation categories result to inform your calculation.

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Frequently Asked Questions