Carmedin
Free ToolLIVE
Body Fat Calculator.
Estimate body fat percentage using the U.S. Navy circumference method, with a BMI-method comparison and ACE classification. Download your result as an image. For adults only — this is a screening estimate, not a diagnosis.
Processed locally
Navy + BMI comparison
ACE classification context
Enter measurements
Adults only · client-side calculationMeasurementsU.S. Navy circumference method
Processed locally in your browser. Values entered here are never transmitted to or stored by Carmedin.
ResultPrimary estimate & comparison
U.S. Navy method
—
estimated body fat
Composition context
Fat Mass—
Lean Mass—
BMI Method—
Ideal for Age—
How it's calculated: The primary result uses the U.S. Navy circumference method (Hodgdon & Beckett, 1984) from neck, waist (+hip for women), and height. The BMI method (Deurenberg, 1991) is shown for comparison only and uses just height, weight, age, and sex. Both are estimates — accuracy versus DEXA is typically ±3–4 percentage points. Categories follow the American Council on Exercise (ACE) classification. For adults only; not validated for use with children.
Reference
Classification and age context.
The result combines the Navy estimate with ACE body-fat categories and the Jackson–Pollock / Pollock–Wilmore age-reference table.
American Council on Exercise (ACE) Classification
| Description | Women | Men |
|---|
Jackson & Pollock Ideal Body Fat by Age
| Age | Women | Men |
|---|
Reference table (Pollock & Wilmore); validated for ages 20–55. Values between table rows are linearly interpolated; ages outside 20–55 use the nearest endpoint.
Beyond a screening number
We help healthcare organizations build the systems behind population health data.
From clinical data pipelines to reporting dashboards, tools like this are one small piece of a much larger health informatics picture. That's what we do.