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If you want to know your weight and determine it if it is healthy weight, overweight, obese and morbidly obese you would need the following: Kilograms or Weigh Scales and a Meter. These are the things needed to determine your Body Mass Index (BMI) or Quetelet index.
Body Mass Index (BMI) is a heuristic measure of body weight based on a person’s weight and height. Though it does not actually measure the percentage of body fat, it is used to estimate a healthy body weight based on a person’s height, assuming an average body composition. Due to its ease of measurement and calculation, it is the most widely used diagnostic tool to identify weight problems within a population, usually whether individuals are underweight, overweight or obese.
The mechanics: Take your weight in kilograms then divide it by your height in meters and when you get the result divide your height in meters again. Sample: your weight is 150kls, your height is 2.5 meters = 150/2.5=60/2.5=24. Your total weight is 24.
The Body Mass Index for a Healthy Weight is from 20 to 24; for the Body Mass Index for an Overweight is from 25 to 29; for the Body Mass Index for an Obese is from 30 to 39; while for the Body Mass Index for the Morbidly Obese is 40 plus.
Check out the link to read more: How to Determine BMI Without Seeing a Doctor?