体脂肪率計算機

共有リンク

はじめに

Body Fat Calculator — Body fat percentage via the U.S. Navy method. Enter Gender, Height (cm), Waist (cm), Neck (cm) to get an instant, accurate result.

計算式

U.S. Navy method (men): 495/(1.0324 − 0.19077×log₁₀(waist−neck) + 0.15456×log₁₀(height)) − 450. Women add hip and use a different formula constant.

ステップごとの説明

Enter the Gender.
Enter the Height (cm).
Enter the Waist (cm).
Enter the Neck (cm).
Click Calculate to see your result instantly.

実例

Example: With Gender = male, Height (cm) = 175, Waist (cm) = 85, Neck (cm) = 38, the Body Fat Calculator gives Body Fat Pct: 16.938.

よくある質問

Why is hip measurement only needed for women?

The U.S. Navy method's female formula specifically accounts for hip circumference, while the male formula does not.

How accurate is this method?

It's a widely used estimate (±3-4%) but not as precise as clinical methods like DEXA scans.

What inputs does the Body Fat Calculator need?

You'll need to provide: Gender, Height (cm), Waist (cm), Neck (cm). All fields use sensible defaults, so you can see a working example immediately and then adjust the values to match your own numbers.

How accurate is the Body Fat Calculator?

The Body Fat Calculator applies the formula exactly as calculated — U.S. Navy method (men): 495/(1.0324 − 0.19077×log₁₀(waist−neck) + 0.15456×log₁₀(height)) − 450. Women add hip and use a different formula constant. — so results are precise for the inputs you provide. Accuracy depends on entering correct, realistic input values.

Is this a medical diagnosis?

No. The Body Fat Calculator provides an estimate based on standard formulas and general population data, not a medical diagnosis or personalized clinical advice. Individual results can vary — consult a doctor or other qualified healthcare provider for medical concerns.

Is the Body Fat Calculator free to use?

Yes, the Body Fat Calculator is completely free, requires no signup, and runs instantly in your browser.