The body mass index or Quetelet index is a value derived from the mass and height of an individual. The BMI is defined as the body mass divided by the square of the body height, and is universally expressed in units of kg/m2, resulting from mass in kilograms and height in metres. More on Wikipedia
Instruction: Measure skinfold in millimeters as indicated on the pictures and enter values.
You use energy no matter what you're doing, even when sleeping. Thus your Basal Metabolic Rate (BMR) is the number of calories you'd burn if you stayed in bed all day.
Broca Formula
Your waist to hip ratio is an important tool that helps you determine your overall health risk. People with more weight around their waist are at greater risk of lifestyle related diseases such as heart disease and diabetes than those with weight around their hips. It is a simple and useful measure of fat distribution.