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Fitness

Estimate Your Body Fat Percentage

Calculate body fat using the US Navy tape method. No calipers or equipment needed — just a tape measure.

📅 Updated April 2026 ✅ Formula verified 📖 4 min read 🆓 Free · No sign-up

Métodos

Método da Marinha US: usa circunferência de pescoço, cintura e quadril (mulheres). Precisão ±3-4%. Adipômetro (plicômetro): ±3%. Bioimpedância (balanças inteligentes): ±4-5%. DEXA scan: ±1-2% (padrão ouro, R$150-400). Balanças inteligentes são as menos precisas — use para acompanhar tendências, não valores absolutos.

Faixas Saudáveis

Homens: atlético 6-13%, fitness 14-17%, médio 18-24%, acima 25%+. Mulheres: atlético 14-20%, fitness 21-24%, médio 25-31%, acima 32%+. Mulheres naturalmente têm mais gordura — é biologicamente necessário.

⚡ CalcWolf Insight

BMI classifies 30% of "normal weight" people as healthy when they actually have obesity-level body fat (called "skinny fat" or normal weight obesity). Body fat percentage is a far better indicator of metabolic health than BMI — two people with identical BMI can have dramatically different body fat levels.

Frequently asked questions
Qual BF% é saudável?▾
Homens: 14-24%. Mulheres: 21-31%. Abaixo de 5% (H) ou 12% (M): perigoso.
Como medir em casa?▾
Meça pescoço e cintura com fita métrica e use a fórmula da Marinha (este calculador). Balanças inteligentes: acompanhe tendências, não confie no número absoluto.
✓ Math logic verified against primary sources → See our verification process
Kevin Glover
Founder, CalcWolf · GLVTS · Blickr
All formulas sourced from primary references — IRS publications, peer-reviewed research, and official standards. Results are tested against independent reference calculators before publishing. Rates and brackets updated when official sources change. Editorial policy →
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Found a bug or outdated data? Reports go directly to Kevin and are reviewed personally.