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YMCA Body Fat Calculator

Result

Calculated result -4306.7 Based on the values entered.
↗ Health

YMCA Body Fat Calculator — free online calculator.

Formula

Men: %BF = (−98.42 + 4.15·waist(in) − 0.082·weight(lb)) / weight(lb) × 100
  • YMCA Body Fat Calculator calculates its result from Weight Lb, Waist In. It uses the formula Men: %BF = (−98.42 + 4.15·waist(in) − 0.082·weight(lb)) / weight(lb) × 100. Change any input to recalculate the result instantly. This is an informational calculation and is not medical advice.
  • The main inputs are Weight Lb, Waist In. Enter them in the units and format shown in the calculator.
  • Use the measurement units shown beside each field. The result is an estimate and should be interpreted in context.
  • Changing any input above recalculates the result with the same calculation engine used by this page.

Example: YMCA Body Fat

Inputs
  • Weight Lb: 2
  • Waist In: 3

Using Weight Lb = 2, Waist In = 3, the calculated result is -4306.7.

Sample result: Calculating…

Frequently asked questions

What does the YMCA Body Fat calculate?

YMCA Body Fat Calculator — free online calculator.

Which values should I enter?

Enter Weight Lb, Waist In using the units and format shown beside each field.

What formula does this calculator use?

The calculator uses the following relationship: Men: %BF = (−98.42 + 4.15·waist(in) − 0.082·weight(lb)) / weight(lb) × 100.

Why might my result differ from another source?

Results can differ because measurement methods, rounding and assumptions vary. This calculator is an estimate and is not a medical diagnosis.

Does the result update automatically?

Yes. Changing an input updates the result using the same calculation engine shown on this page.

Page information

Updated: October 7, 2026