Body Fat Calculator
Estimate body fat percentage using the US Navy method (measurements in cm).
Inputs
Result
Enter values on the left and select Equals to see the result here.
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What the Body Fat Calculator does
- Estimates body fat percentage from body measurements.
- Returns a simple category label for context.
How to use the Body Fat Calculator
- Choose sex and enter height, waist, and neck measurements in cm.
- If female, also enter hip measurement.
- Click Calculate to see estimated body fat percentage.
Formula / methodology used
- Uses the US Navy body fat formula (log-based).
- Accuracy depends on consistent measurement technique.
Example calculation
Male, height 180 cm, waist 90 cm, neck 40 cm.
- Enter measurements
- Apply Navy formula
- Round to 1 decimal
Result: Outputs body fat % and a category label.
Body Fat Calculator FAQs
Where should I measure waist and neck?
Use a consistent method each time. Waist is typically at the navel; neck is measured just below the larynx.