Body Fat
Estimate body fat from the age, body, activity, or schedule inputs. Use this free body fat for fast, clear results with no signup required.
Body Fat guide
What it is for
The Body Fat provides a planning estimate from the information entered.
How it is calculated
The adult screening estimate uses 1.2 × BMI + 0.23 × age − 16.2 for males, or −5.4 for females. BMI uses pounds / inches² × 703.0696; no circumference measurements are used.
Assumptions
It assumes the inputs use the requested units and represent a general reference population, not an individual assessment.
Example
At age 30, 150 lb and 65 in, the female estimate is about 31.5% body fat. This formula-based estimate is not a body-composition measurement.
Limitations
This is an educational estimate, not a diagnosis, treatment, or dosing instruction. Consult a licensed healthcare professional, particularly during pregnancy, with symptoms, or before changing health behavior.
Public source: CDC: About Healthy Weight