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Body Fat % Calculator: Guide

Calculate your body fat percentage

  • What is Body Fat %?
  • Formulas
  • Tips
  • How to Use
  • Real-World Applications
  • FAQs

What is Body Fat %?

Proportion of total body weight that consists of fat tissue.

The Body Fat Percentage Calculator helps you perform fast, accurate calculations based on your inputs.

It is designed for practical decision-making with clear and actionable outputs.

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Formulas

Navy Method: neck, waist, hip measurements

BMI Method: estimates from BMI, age, gender

Results are computed using standard formulas tied to the selected calculator type and inputs.

Any input update recalculates the results instantly.

Tips

  • Measure at same time each day
  • Track trends over weeks
  • Focus on Estimate body fat using US Navy or BMI methods for a better understanding of body composition.

How to Use

  • Enter the required values in these fields:
  • - Gender
  • - Age
  • - Weight (lbs/kg)
  • - Height (in/cm)
  • Review the instant output and compare scenarios before finalizing your decision.

Real-World Applications

This calculator supports multiple use cases as shown in the table below.

TypeDescription
BMI FormulaEstimate body fat from BMI
Navy MethodUS Navy body fat formula

FAQs

Are the results accurate?

Yes, results are computed using standard formulas based on the inputs provided.

Why does a small input change affect the output significantly?

Some formulas are sensitive to inputs, so even small changes can produce noticeable output differences.

Formula: Male: 86.010×log10(waist-neck) - 70.041×log10(height) + 36.76

Male 175cm, waist 85cm, neck 37cm → ~24% body fat

cm
kg
cm
cm
cm

Body Fat Percentage

17.8%

Obese · Ideal: 6–17%

Fat Mass

13.3 kg

Lean Mass

61.7 kg

BMI: 24.5

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