
Normal Weight
or Overweight?
Use the BMI Formula to Find Out
The BMI formula yields a number
that indicates whether we
are underweight, normal weight,
overweight, or obese. BMI stands for Body Mass Index. A number between 18.5 and 24.9 means
that you are normal weight. Most health professionals today use the BMI because it gives them a way to
compare obesity rates between individuals or
populations.
BMI Table
This table applies to adults aged 20 and
older. There are separate tables for
children and teenagers.
BMI 
Weight category 
Below
18.5 
Underweight 
18.5
 24.9 
Normal
weight 
25
 29.9 
Overweight 
30
and above 
Obese 
Body Mass Index Formula for
English/U.S. System
As an example, we will use a
person who weighs 140 pounds and is 67 inches (5' 7") tall:
 Multiply your weight in pounds by 703.
(Example: 140 x 703 = 98420)
 Square your height in inches (multiply
by itself)
(Example: 67 x 67 = 4489)
 Divide the first number by the second.
(98420/4489 = 21.9)
 The BMI is 21.9, which is in the normal weight
range.
Body Mass Index Formula for
Metric System
As an example, we will use a person who weighs 78 kilograms and is 183
cm tall:
 Determine your weight in kilograms.
(That's easy: 78)
 Multiply your height in meters by itself
(square it).
(183 cm = 1.83 meters)
(1.83 x 1.83 = 3.3489)
 Divide the first number by the second.
(78/3.3489 = 23.3)
 The BMI is 23.3, which is in the normal range.
If your BMI is 25 or above, your health may be at risk. Use our free vegan weight
loss plan to get your BMI into the normal range. You will
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