BMI and Waist Circumference are the common ways to assess body weight.  BMI is Body Mass Index.  It’s a mathematical formula that involves ones height and weight.
Calculating BMI is very easy.  I can explain it in following steps.

1. Calculate your height in meter squared.
2. Divide weight in kilograms by your height in meter squared. This gives your BMI.

Note
To get weight in kilograms do divide your weight in pounds by 2.2
To  get height in meters do multiply your height in inches by 2.54
Thus…BMI is weight in kilograms divided by height in meter squared.

BMI= kg/m2

• BMI can tell about where you stand in the scale of underweight to obesity.
• BMI- less than 18.5 come under Underweight category.
• BMI -18.5 and 24.9 is normal weight.
• BMI -25 and 29.9 is overweight.
• BMI-30 or greater is Obesity.

Waist Circumference:

This tool also helps in assessing body weight. It deals with where body fat is accumulated. There are different body shapes. The two main fat accumulation body shapes are apple and pear. Fat accumulation around abdomen is usually seen to bring more serious health issues. The reason being, liver converts abdominal fat into forms that circulate in the blood stream.