Body Fat Calculator



Body Fat Percentage Calculator

Welcome to our Body Fat Calculator! We're dedicated to providing you with a reliable and easy-to-use tool to accurately measure your body fat percentage. Whether you're an athlete, fitness enthusiast, or simply want to track your health progress, our Body Fat Calculator is here to help.

With our advanced algorithms, you can quickly determine your body fat index and understand the percentage of body fat relative to your total weight. We prioritize precision and usability, ensuring that you get accurate results every time you use our calculator.

Tracking your body fat percentage is essential for monitoring your overall health and fitness goals. By knowing your body composition, you can make informed decisions about your diet, exercise routine, and lifestyle choices.

Our Body Fat Percentage Calculator is designed to be intuitive and accessible to everyone. Whether you're on your desktop, tablet, or mobile device, you can easily input your measurements and receive instant feedback on your body fat percentage.

Join countless others who rely on our Body Fat Calculator to stay on top of their fitness journey. Start using our calculator today and take the first step towards a healthier, happier you!

How to Calculate percentage of body fat?

U.S. Navy Method:

Various techniques are employed for determining body fat percentage. The calculator above adopts a method rooted in equations formulated by Hodgdon and Beckett at the Naval Health Research Center in 1984. Below are the steps for measuring pertinent body parts and the corresponding equations utilized:

Measure the subject's waist circumference horizontally around the navel for men, and at the narrowest width for women. Ensure the subject maintains a relaxed stance to ensure accurate measurements.

Measure the subject's neck circumference starting below the larynx, with the tape sloping downward to the front. The subject should avoid extending their neck outward.

For women only: Measure the subject's hip circumference at its widest horizontal point.

Once these measurements are obtained, employ the following formulas to estimate body fat. Two sets of equations are provided, one using the U.S. customary system (USC) with inches, and the other using the International System of Units, specifically centimeters:

Body fat percentage (BFP) formula for males:
USC Units:
BFP = 86.010 × log10(waist - neck) - 70.041 × log10(height) + 36.76;
SI, Metric Units:
BFP = (495 / (1.0324 - 0.19077 × log10(waist - neck) + 0.15456 × log10(height))) - 450

Body fat percentage (BFP) formula for females:
USC Units:
BFP = 163.205 × log10(waist + hip - neck) - 97.684 × log10(height) - 78.387
SI, Metric Units:
BFP = (495 / (1.29579 - 0.35004 × log10(waist + hip - neck) + 0.22100 × log10(height))) - 450

It's important to note that these calculations provide estimates based on various assumptions to cater to a broad population. For more precise measurements, instruments like bioelectric impedance analysis or hydrostatic density testing are recommended.

Fat mass (FM) formula:
FM = BF × Weight

Lean Mass (LM) formula:
LM = Weight − FM

BMI Method:

Another approach to estimating body fat percentage involves Body Mass Index (BMI). Refer to the BMI Calculator for BMI estimation and further details on its calculation, implications, and limitations. In summary, BMI estimation requires the measurement of height and weight. With BMI, the following formulas can estimate body fat percentage:

Body fat percentage (BFP) formula for adult males:
BFP = 1.20 × BMI + 0.23 × Age - 16.2

Body fat percentage (BFP) formula for adult females:
BFP = 1.20 × BMI + 0.23 × Age - 5.4

Body fat percentage (BFP) formula for boys:
BFP = 1.51 × BMI - 0.70 × Age - 2.2

Body fat percentage (BFP) formula for girls:
BFP = 1.51 × BMI - 0.70 × Age + 1.4


  • How does the Body Fat Calculator work?
    Our Body Fat Calculator utilizes a formula that takes into account various factors such as height, weight, gender, and age to estimate your body fat percentage. You simply input your measurements, and the calculator provides you with your estimated body fat percentage.

  • How accurate is the Body Fat Calculator?
    While our calculator provides estimates based on commonly used formulas, it's important to note that no calculator can provide 100% accuracy. Factors such as hydration levels, muscle mass, and bone density can influence the results. However, our calculator aims to provide a close estimation of your body fat percentage.

  • Can the Body Fat Calculator be used by everyone?
    Yes, our Body Fat Calculator is designed to be used by individuals of all ages and fitness levels. However, it's important to consult with a healthcare professional if you have any concerns about your health or if you require more precise measurements.

  • How often should I use the Body Fat Calculator?
    The frequency of using the Body Fat Calculator depends on your personal goals and preferences. Some people may choose to use it weekly to track their progress, while others may use it monthly or less frequently. Ultimately, it's up to you to determine how often you'd like to monitor your body fat percentage.

  • Can the Body Fat Calculator help me lose weight?
    While the Body Fat Calculator can provide valuable insights into your body composition, it's just one tool in the weight loss journey. Along with monitoring your body fat percentage, it's important to focus on maintaining a balanced diet, engaging in regular exercise, and adopting healthy lifestyle habits to achieve your weight loss goals.