BMI(Body Mass Index) is a index to measure the person's leanness or corpulence based on height and weight. It is widely used indicator for a healthy body weight based on height.

This calculator will calculate the BMI score, BMI Prime, CI index, and ideal weight based on your body status. A detail report will generated to explain what the values means.

BMI is defined as the body mass with unit of kg divided by the square of the body height with unit of meter in metric units. Therefore, if you select Metric units, the formula is: \[ BMI = \frac{Mass}{Height^2} (\frac{kg}{m^2})\] If you select US units, we will need to convert it into metric units firstly and then apply the formula. Since 1 pound = 0.453592 kg and 1 inch = 2.54 cm, given weight in unit of pound and height in units of inches, the BMI formula will be: \[BMI = \frac{0.45592\times Mass}{(\frac{2.54 \times Height}{100})^2} = 703 \times \frac{Mass}{Height^2} \]

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

In public health BMI can serve as a vague means of estimating adiposity. It is suitable for recognizing trends within sedentary or overweight individuals.

In Clinical practice, BMI is generally used to figure out whether an individual is underweight, overweight or obese.

**Waist circumference** is a good indicator of visceral fat. Waist to height ratio (WHtR), also called waist to stature ratio (WSR) is a measure of the distribution of body fat.
Waist to Hip Ratio (WHR) is the ratio of the circumference of the waist to that of the hips. WHR has been used as an indicator or measure of health and risk of developing health related
problems.
Use
Ultimate (for all) Calculator to calculate these values.

**Body Shape Index (ABSI)** was developed by city college of New York based on the observation that carrying excess belly fat is more risky for your health.
Refer to Ultimate (for all) Calculator for the detail.

**Surface Based Body Shape Index (SBSI)** is based on four key measurements: the body surface area (BSA), vertical trunk circumference (VTC), waist circumference (WC) and height (H) is considered as
a better indicator of the body shape. Many studies found that the SBSI outperformed BMI, WHtR and ABSI. You can use Ultimate (for all) Calculator
to calculate this index.