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Fitness & Health

BMI Calculator

Calculate BMI, category, and a healthy-weight range from height and weight.

Calculator.net reference
Inputs
Defaults are prefilled so the result is visible immediately.
ft
in
lb
Results
Results update as the calculator inputs change.

BMI

24.4

This calculator is informational and is not medical advice.

Category

Healthy weight

Healthy weight range

129-174 lb

Height in inches

70

Formula and Assumptions
BMI = 703 x weight(lb) / height(in)^2.

BMI is a screening metric and does not distinguish muscle mass from body fat.

The healthy range uses the common 18.5 to 24.9 BMI interval.

Reference Upgrade
Built from the Calculator.net model, with added context.

Live validation and instant result updates instead of a submit-only workflow.

Multiple decision metrics are shown together, not only the primary answer.

Formula notes and assumptions are visible on the page so the math is easier to audit.

Reference Model

Modeled after the input style and primary output on Calculator.net's BMI Calculator.

The page keeps the math in one place and exposes the assumptions beside the result.

Default inputs: heightFeet=5, heightInches=10, weight=170