Fat Percentage Calculator

Body Fat Percentage: 20.46%

Step 1: Convert measurements to inches (since formula uses inches)

Height: 175 cm × 0.393701 = 68.90 inches

Neck: 38 cm × 0.393701 = 14.96 inches

Waist: 85 cm × 0.393701 = 33.46 inches

Step 2: Calculate Body Fat % (Male)

Body Fat % = 86.010 × log10(Waist – Neck) – 70.041 × log10(Height) + 36.76

= 86.010 × log10(33.46 – 14.96) – 70.041 × log10(68.90) + 36.76

= 86.010 × log10(18.50) – 70.041 × log10(68.90) + 36.76

= 86.010 × 1.2672 – 70.041 × 1.8382 + 36.76

= 109.09 – 128.77 + 36.76 = 20.46%


Fat Percentage Calculator: Achieve Your Fitness Goals

Accurately estimate your fat percentage using science-based methods—essential for tracking fitness progress and health risks.

How to use:

  1. Enter Metrics:
    • Gender (biological sex)
    • Age
    • Height (cm/ft)
    • Weight (kg/lb)
    • Waist/Neck/Hip measurements
  2. Select Formula:
    • US Navy Method
    • BMI-based Estimate
    • Skinfold (optional)
  3. Get Results:
    • Fat %
    • Health risk category
    • Ideal range for your profile

Realistic Global Examples:

ProfileAgeGenderMeasurementsFat %Health Risk
Office Worker38MaleWaist: 94 cm, Neck: 40 cm24%Moderate (reduce by 6%)
Marathon Trainee29FemaleWaist: 71 cm, Hips: 98 cm19%Low (athlete range)
Postpartum Recovery32FemaleWaist: 86 cm, Neck: 34 cm28%Elevated (target 25%)
Retiree68MaleWaist: 102 cm, Neck: 42 cm31%High (cardiovas

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