Body Composition Evaluator
US Navy Protocol. Replace calipers with a tape measure and discover your Body Fat Percentage, Physical Category, and exact Lean Mass with high mathematical precision.
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Measurements
Mais preciso. Precisa medir pescoço e cintura com fita.
Body panel
Estimates use the U.S. Navy method (Hodgdon & Beckett, 1984) and Mifflin-St Jeor BMR formula. Not a medical diagnosis — consult a healthcare professional or licensed nutritionist before making clinical decisions.
As fórmulas: Marinha e Deurenberg
Nenhuma das duas mede gordura diretamente — isso só um exame como o DEXA faz. Ambas estimam a partir de medidas simples, com margens de erro diferentes.
%GC = 1,20 × IMC + 0,23 × idade − 10,8 × sexo − 5,4%GC = 495 ÷ (1,0324 − 0,19077 × log₁₀(cintura − pescoço) + 0,15456 × log₁₀(altura)) − 450%GC = 495 ÷ (1,29579 − 0,35004 × log₁₀(cintura + quadril − pescoço) + 0,221 × log₁₀(altura)) − 450A Marinha costuma ser mais precisa por medir onde a gordura de fato se acumula; o Deurenberg parte do IMC e por isso confunde massa muscular com gordura em quem treina. Para acompanhar evolução, o que importa é usar sempre o mesmo método. Estimativa não substitui avaliação profissional.
§ How to use
How to calculate your body-fat percentage
Estimate body-fat percentage using the Deurenberg formula (BMI + age + sex) or tape measurements (US Navy method).
Choose a method
Deurenberg (fast, BMI-based) or US Navy (more accurate, needs a tape measure).
Enter your data
For Navy: neck, waist (and hips for women). For Deurenberg: weight, height, age.
Read the % and category
Bands: athlete (6-13% men, 14-20% women), fitness, acceptable, obese. The result is an estimate, not an exact measure.
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