Calculator

BMI Calculator

Estimate body mass index and see the standard adult screening range.

UNDERSTAND THE ANSWER

How is this calculated?

BMI is a population-level screening measure. It does not directly measure body fat, fitness or health and can be misleading for some people.

BMI formula for US unitsBMI = 703 × weight (lb) ÷ height² (in)

A practical example

A person who is 5 ft 10 in and weighs 170 lb has a BMI of about 24.4.

Calculation assumptions

  • The adult US-unit BMI formula is used.
  • Height and weight are entered accurately without adjustment for clothing.
  • Adult reference ranges are used and may not apply to children or pregnancy.