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Health calculator

BMI Calculator

Calculate adult body mass index from height and weight using the standard U.S. customary-units formula.

Change any value to update the estimate. Values stay in your browser.

Your estimate24.4

adult body mass index

CDC adult category
Healthy range
BMI 18.5–24.9 weight range
128.95–173.56 lb
Height
5 ft 10 in
BMI is a screening measure, not a diagnosis; interpret it with other health information.

Formula used

BMI = weight in pounds ÷ height in inches² × 703.

Worked example

An adult who weighs 170 pounds and is 5 feet 10 inches tall has a BMI of approximately 24.4.

How to understand the result

BMI is a screening measure, not a diagnosis. It does not directly measure body fat or account for every difference in body composition.

Assumptions and limits

  • Adult screening use
  • Accurate height and weight
  • Not intended to diagnose health conditions

Frequently asked questions

Can BMI diagnose a health condition?

No. A healthcare professional considers BMI alongside history, measurements, and other clinical information.

Is this calculator for children?

No. BMI interpretation for children and teens uses age- and sex-specific percentiles.

Sources and review

Formula and explanatory content reviewed August 31, 2026. See the Kalcue methodology and editorial policy.