This Body Fat Calculator is a free online tool that estimates the percentage of fat in your body based on factors like age, gender, weight, height and measurements. This calculator provides a more comprehensive view of your health by distinguishing between fat mass and lean mass. It uses scientifically validated formulas to deliver personalized results, which helps you to set realistic fitness and health goals. This tool is also known as: body fat percentage calculator or body fat composition calculator etc.
Body Fat Calculator
How to Use the Body Fat Calculator
- Select Your Gender: Choose between male or female using the radio buttons.
- Enter Your Age: Input your age in years.
- Enter Your Weight: Input your weight in kilograms or pounds.
- Enter Your Height: Input your height in centimeters or inches.
- Calculate: Click the “Calculate” button to see your body fat percentage displayed in a distinct color. The tool works seamlessly on desktops, tablets and mobile devices.
Why Use a Body Fat Calculator?
- Accurate Health Insights: It provides a clearer picture of your health than just weight alone.
- Health Awareness: Knowing your body fat percentage can help you identify potential health risks such as obesity or being underweight.
- Fitness Tracking: Helps you monitor changes in body composition over time.
- Goal Setting: Assists in setting realistic fitness and weight loss goals.
- User Friendly: Designed to be simple and intuitive, which makes it usable to everyone.
If you are interested in how it works, here is the formula used:
Body fat % = –44.988 + (0.503 × age) + (10.689 × sex) + (3.172 × BMI) – (0.026 × BMI²) + (0.181 × BMI × sex) – (0.02 × BMI × age) – (0.005 × BMI² × sex) + (0.00021 × BMI² × age)
where:
- Sex value: male = 0 and female = 1
- BMI = weight/ height² [kg/m]²
This equation was validated by the American Diabetes Association. It was tested on 6,510 people and showed an estimated error of 4.66%.
Please note that, due to the various body types of the people, the calculator may not be 100% accurate! For example, a muscular person with high weight and BMI values, can be perfectly fit and can’t be termed as obese.
Disclaimer: This tool is for information purpose only and it should not be considered as medical advice. Please consult your physician for medical advice.
References:
The American Council on Exercise Body Fat Categorization:
|
Description |
Women | Men |
|
Essential fat |
10-13% |
2-5% |
|
Athletes |
14-20% |
6-13% |
|
Fitness |
21-24% |
14-17% |
|
Average |
25-31% |
18-24% |
| Obese | 32%+ |
25%+ |
Jackson & Pollock Ideal Body Fat Percentages:
|
Age |
Women |
Men |
|
20 |
17.70% |
8.50% |
|
25 |
18.40% | 10.50% |
| 30 | 19.30% |
12.70% |
|
35 |
21.50% | 13.70% |
|
40 |
22.20% |
15.30% |
|
45 |
22.90% | 16.40% |
| 50 | 25.20% |
18.90% |
| 55 | 26.30% |
20.90% |
