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Body Fat Calculator

Body Fat Calculator

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Detailed Guide Coming Soon

We're working on a comprehensive educational guide for the Body Fat Calculator in your language. The content below is shown in English.

What is Body Fat Calculator?

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A body fat percentage calculator estimates fat mass as a proportion of total body weight using skinfold measurements, circumference methods (US Navy), or BMI-derived formulas.

Calkulon makes complex calculations simple — built for students and everyday problem-solvers.

נוסחה

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f(x)US Navy (men): %BF = 86.010×log(waist−neck) − 70.041×log(height) + 36.76; (women): 163.205×log(waist+hip−neck) − 97.684×log(height) − 78.387

Variable Legend

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סמלשםיחידהתיאור
%BFBody fat percentage%—
WWaist circumferencecm—
HHeightcm—
NNeck circumferencecm—

How to Body Fat Calculator

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  1. 1US Navy method (men): 86.010×log(waist−neck) − 70.041×log(height) + 36.76
  2. 2US Navy method (women): 163.205×log(waist+hip−neck) − 97.684×log(height) − 78.387
  3. 3Jackson-Pollock: uses skinfold caliper measurements
  4. 4DEXA scan is the gold standard but requires clinical equipment

Worked Examples

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Example 1
Given:Male, waist 85cm, neck 38cm, height 178cm
תוצאה:Body fat ≈ 86.010×log(47) − 70.041×log(178) + 36.76 ≈ 17.5%

Real-World Applications

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Fitness tracking and progress monitoring

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Athletic performance assessment

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Health risk evaluation

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Nutritionist consultation baseline

Body Fat % Categories (ACE)

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CategoryMenWomen
Essential fat2–5%10–13%
Athletes6–13%14–20%
Fitness14–17%21–24%
Acceptable18–24%25–31%
Obese25%+32%+

Frequently Asked Questions

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Q

What's a healthy body fat percentage?

A

Athletes: 6-13% (male), 14-20% (female). Fitness: 14-17% (male), 21-24% (female). Varies by age and sport.

Q

Is BMI the same as body fat %?

A

No. BMI = weight/height² and doesn't distinguish muscle from fat. Body fat % is more accurate for health.

Q

How accurate is the Navy method?

A

Accurate within ±2-3%. DEXA scan (clinical) is more precise but requires equipment and cost.

למטרות מידע בלבד. כלי זה אינו תחליף לייעוץ רפואי מקצועי, אבחון או טיפול. התייעצו תמיד עם איש מקצוע רפואי מוסמך.
Formula-verified for precision
Reviewed October 2026
Our methodology

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