Estimate body fat percentage with Navy and BMI methods, plus body composition and healthy range context.
Run the calculator to see body-fat %, composition, and range guidance.
This calculator estimates body fat using U.S. Navy circumference equations and can cross-check with a BMI-based model. It then translates the percentage into practical context: healthy range status, composition split, and confidence based on method agreement.
Step 1
Capture accurate measurements (height, neck, waist, and hip for women).
Step 2
Run Navy or BMI method and compare estimates for consistency checks.
Step 3
Review healthy range status and body composition split when weight is provided.
Step 4
Track weekly trend under identical conditions for better decision quality.