BMI is a way to determine if a person is underweight, normal weight, overweight or obese.
Body mass index (BMI) is a measurement of body fat based on height and weight. The formula for calculating BMI is given in Table 1 or you can use the body mass index calculator below.
Maintaining a healthy weight offers the following health benefits:
- Reduced risk of heart disease and certain cancers
- Better sleep quality
- Fewer muscle and joint pains
- Reduced risk of high blood pressure and diabetes
- Better regulation of bodily fluids
- Reduced burden on the heart and circulatory system
- High energy and ability to complete the desired activities
- Reduced cholesterol levels
- Reduced risk of gallbladder disease
Formula: weight (kg) / height (m)2
The formula for BMI is weight in kilograms divided by height in meters squared. If height has been measured in centimeters, divide by 100 to convert this to meters.
Formula: 703 x weight (lbs) / height (in)2
When using English measurements, pounds should be divided by inches squared. This should then be multiplied by 703 to convert from lbs/inches2 to kg/m2.
Example: If a person weighs 65 kg and the person’s height is 165 cm (1.65 m), the BMI is calculated as 65 ÷ (1.65)2 = 23.87 kg/m2, which means that the person has a BMI of 23.87 kg/m2 and is considered to have a healthy weight.
When calculating in pounds and inches, if a person weighs 120 lbs and the person’s height is 5 feet 6 inches (66 inches), the BMI is calculated as 703 x 120/(66)2 = 19.3 kg/m2, which means that the person has a BMI of 19.3 kg/m2 and is considered to have a healthy weight.
What is the body mass index (BMI)?
Body mass index (BMI) is a person’s weight in kilograms divided by the square of height in meters. It indicates the amount of body fat.
BMI is the most inexpensive screening tool to measure body fat. Although it does not directly measure body fat, it can be correlated with a more direct measure of body fat.
The various categories of BMI include
- BMI values less than 18.5 kg/m2 are considered underweight
- BMI values between 18.5 kg/m2 to 24.9 kg/m2 are healthy
- BMI values between 25 kg/m2 to 30 kg/m2 are overweight
- BMI values greater than 40 kg/m2 are considered obese
What is the ideal BMI?
The ideal weight has been mentioned in Table 2.
(BMI under 25 kg/m2)
(BMI 25–29.9 kg/m2)
(BMI 30 kg/m2 and above)
118 or less
143 or more
123 or less
148 or more
127 or less
153 or more
131 or less
158 or more
135 or less
164 or more
140 or less
169 or more
144 or less
174 or more
149 or less
180 or more
154 or less
186 or more
158 or less
191 or more
163 or less
197 or more
168 or less
203 or more
173 or less
209 or more
178 or less
215 or more
183 or less
221 or more
188 or less
227 or more
193 or less
233 or more
199 or less
240 or more
204 or less
246 or more