The Durnin and Womersley Skinfold Calculator is a tool grounded in scientific research, aimed at estimating an individual’s body fat percentage. This method utilizes skinfold thickness measurements from specific body sites to calculate body fat. Understanding one’s body fat percentage is vital for numerous reasons: it helps in assessing health risks, tracking physical fitness, and setting realistic health and fitness goals.
The Science Behind the Calculator
At its core, the Durnin and Womersley method is about precision in measuring the subcutaneous fat – the layer of fat just beneath the skin. It’s based on the premise that a significant portion of the total body fat is subcutaneous. Therefore, by measuring the thickness of skinfolds at key points on the body, one can estimate the overall body fat percentage.
Formula of Durnin and Womersley Skinfold Calculator
For Males:
Body Fat Percentage = 0.29288 * (Sum of Skinfold Thicknesses) - 0.0005 * (Sum of Skinfold Thicknesses)^2 + 0.15845 * Age - 5.76377
For Females:
Body Fat Percentage = 0.29669 * (Sum of Skinfold Thicknesses) - 0.00043 * (Sum of Skinfold Thicknesses)^2 + 0.02963 * Age + 1.4072
*Note: “Sum of Skinfold Thicknesses” is the total of measurements taken at specific body sites in consistent units (e.g., millimeters).
Table for General Terms and Calculations
Body Fat Percentage Interpretation
| Body Fat % Range | Interpretation for Males | Interpretation for Females |
|---|---|---|
| 2-5% | Essential Fat | Essential Fat |
| 6-13% | Athletes | Athletes |
| 14-17% | Fitness | Fitness |
| 18-24% | Average | Average |
| 25% and above | Obese | Obese |
Note: These ranges are general guidelines and can vary based on factors like age, muscle mass, and physical condition.
Conversion Table for Skinfold Measurements
| Measurement | Conversion |
|---|---|
| 1 inch | 25.4 mm |
| 1 mm | 0.03937 inches |
Note: When using the Durnin and Womersley formula, ensure all skinfold measurements are in the same unit (preferably millimeters for accuracy).
Example of Durnin and Womersley Skinfold Calculator
Let’s calculate the body fat percentage for a 35-year-old male with a total skinfold thickness of 50 mm:
Body Fat Percentage = 0.29288 * 50 - 0.0005 * 50^2 + 0.15845 * 35 - 5.76377
Calculate the result using the formula.
Most Common FAQs
A: It is widely recognized as a reliable method when performed correctly.
A: This calculator is designed for adults. Consult a healthcare professional for children.