What is BMI?
Body Mass Index is a simple index of weight-for-height that is commonly used to classify overweight and obesity in adults. It is defined as a person’s weight in kilograms divided by the square of his height in meters (kg/m2). It is used as a screening tool to estimate the body fat and assess the risks for diseases related to increased body fat. The risk of developing many diseases increases with a higher BMI.
How to Compute for BMI?
Given: Patient is 5’2 and 132 lbs.
- Formula: BMI = weight in kg. /square of height in meters (kg/m2)
- Weight = 132 lbs. To convert pounds to kilos, divide with 2.2. Hence,
132/2.2 = 60kg
- Height = 5 ft 2 inches. To convert into meters, multiply feet by 12 and add the inches. Multiply the figure by 2.54. Hence, 5×12= 60+2 = 62×2.54 = 157.48 cm. Then divide by 100 to get meters. 157.48/100 = 1.57m. Multiply the figure by itself, 1.57 x 1.57 = 2.46 m.
- Using the formula: 60 kg / 2.46 m = 24.39
- Look at the BMI chart and see where 24 is. It’s classified as overweight.
This chart was designed specifically for Asians. The BMI cut-off points are lower than the international cut-off points recommended by the World Health Organization (WHO).
- The cut-off values are applicable to adults only, both male and female.
- The above cut-off may not be significant for professional athletes who have excess muscle mass and for pregnant women.
- Consult your doctor to determine if your BMI is a health risk. Further assessment may have to be performed.
- www.who.int ;