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Body Mass Index(BMI) calculator for adults

 

BMI calculator for adults

For adults 20 years old and older, BMI is interpreted using standard weight status categories that are the same for all ages and for both men and women. For children and teens, on the other hand, the interpretation of BMI is both age- and sex-specific. For more information about interpretation for children and teens, visit Child and Teen BMI Calculator.

Below gven is BMI Calculator for adults 20 years old and older

Select a measurement type: English units (feet, inches etc..)
Metric SI units (kg, cm etc..)

Enter your height and weight values
Height: feet

inch(es)
Weight: pounds

ounce(s)
Calculated BMI:
__
 



BMI calculation formula

Measurement Units Formula and Calculation
Metric SI units
Kilograms and meters (or centimeters)
Formula: weight (kg) / [height (m)]2

Example:
Weight = 68 kg, Height = 165 cm (1.65 m)

Calculation: 68 ÷ (1.65)2 = 24.98
Pounds and inches Formula: weight (lb) / [height (in)]2 x 703

Example:
Weight = 150 lbs, Height = 5’5” (65")

Calculation: [150 ÷ (65)2] x 703 = 24.96



BMI Interpretation

The standard weight status categories associated with BMI ranges for adults are shown in the following table.

BMI Weight Status
Below 18.5 Underweight
18.5 – 24.9 Normal
25.0 – 29.9 Overweight
30.0 and Above Obese



BMI's reliability to consider as an indicator of body fatness

The correlation between the BMI number and body fatness is fairly strong; however the correlation varies by sex, race, and age. These variations include the following examples
  • At the same BMI, women tend to have more body fat than men.
  • At the same BMI, older people, on average, tend to have more body fat than younger adults.
  • Highly trained athletes may have a high BMI because of increased muscularity rather than increased body fatness.

BMI Variation in Adults and Children

Although the BMI number is calculated the same way for children and adults, the criteria used to interpret the meaning of the BMI number for children and teens are different from those used for adults. For children and teens, BMI age- and sex-specific percentiles are used for two reasons:
  • The amount of body fat changes with age.
  • The amount of body fat differs between girls and boys.
Because of these factors, the interpretation of BMI is both age- and sex-specific for children and teens. The CDC BMI-for-age growth charts take into account these differences and allow translation of a BMI number into a percentile for a child’s sex and age.

For adults, on the other hand, BMI is interpreted through categories that are not dependent on sex or age.


BMI for child and teens

BMI Calculator for children and teens, visit Child and Teen BMI Calculator.

 


 
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