Given various measurements (e.g., height, weight, waist, etc.), the FitWise Fitness Calculator displays your predicted percentage of body fat.

The “Iliac” field refers to the “iliac crests” (i.e., the wing-like bones on the top of the pelvis). Thus, the Iliac measurement is the measurement around your “hip bones.” (This is the term used by the American Council on Exercise's (ACE's) Personal Trainer Manual, which is where we got the formula).

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