Fitness

Body Fat Calculator

Estimated body composition

Estimate body fat percentage using the US Navy method based on key body measurements.

Measurements

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How It Works

The Formula

US Navy: 495 ÷ (1.0324 − 0.19077×log₁₀(waist−neck) + 0.15456×log₁₀(height)) − 450

Circumference measurements in inches

Worked Example

Waist 34" · Neck 15" · Height 70" (male)

  1. 1495 ÷ (1.0324 − 0.19077×log₁₀(19) + 0.15456×log₁₀(70)) − 450
  2. 2≈ 495 ÷ 1.0290 − 450

Result: ≈ 16.9% body fat

Pro Tip

Measure at the same time of day for consistent tracking.

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