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Body Fat Percentage Calculator
Calculate your body fat percentage using the Deurenberg formula based on BMI, age, and sex.
Enter Your Information
Body fat percentage is calculated using your BMI, age, and sex to assess your body composition.
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Enter your weight, height, age, and sex above to get your body fat percentage calculation.
About Body Fat Percentage
Deurenberg Formula
%BF = (1.20 × BMI) + (0.23 × Age) - (10.8 × Sex) - 5.4
Where Sex: Male = 1, Female = 0
Body Fat Categories
Male:
Female:
Body Fat Percentage Calculator for Health and Nutrition Professionals
Estimate body fat percentage quickly using the Deurenberg equation, providing valuable insights for assessing body composition and guiding nutrition plans.
Understanding Body Fat Percentage in Clinical Practice
Body fat percentage is a crucial indicator for evaluating body composition, helping to distinguish fat mass from lean tissue. It provides insights beyond BMI, which only reflects weight relative to height.
The Deurenberg equation uses BMI, age, and sex to estimate body fat percentage without specialized equipment, making it practical for field or clinical use.
For healthcare and nutrition professionals, body fat percentage is an important metric for monitoring patient progress, managing obesity-related risks, and guiding individualized nutrition interventions.
How to Use This Body Fat Calculator
Enter the patient's BMI value, or calculate it first using the BMI calculator.
Enter the patient's age in years.
Select the patient's sex.
Click Calculate to get the estimated body fat percentage.
Review the category to assess risk and guide personalized recommendations.
Body Fat Percentage Reference Ranges
| Sex | Ideal | Moderate | High |
|---|---|---|---|
| Male | 10 – 20% | 20 – 25% | >25% |
| Female | 18 – 28% | 28 – 33% | >33% |
Frequently Asked Questions
Why is body fat percentage important?
It helps assess body composition and monitor changes in fat mass during weight management or clinical interventions, offering more detailed insights than BMI alone.
How accurate is the Deurenberg equation?
It provides a reliable estimate for most adults but may be less accurate for athletes, older adults, or those with unusual body compositions. More advanced methods like bioimpedance or DEXA scans provide higher precision.
How often should body fat percentage be assessed?
It can be monitored monthly or quarterly in weight management programs or during clinical follow-ups to track progress.
Is body fat percentage better than BMI?
Both indicators serve different purposes. BMI is a quick screening tool, while body fat percentage provides a more precise view of body composition.
Scientific References
Deurenberg P, et al. 'Body mass index as a measure of body fatness: age- and sex-specific prediction formulas.' British Journal of Nutrition, 1991.
Heymsfield SB, et al. 'Human body composition: advances in models and methods.' Annual Review of Nutrition, 2015.
World Health Organization. 'Obesity: Preventing and Managing the Global Epidemic.' Report of a WHO Consultation, 2000.