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BMI Prime Calculator

BMI ÷ 25 — distance from the upper limit of normal.

Compute BMI Prime (BMI divided by the upper-normal threshold of 25), an at-a-glance ratio that tells you how far above or below normal a BMI is.

Priya Venkatesan By Priya Venkatesan
Reviewed by Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

kg
cm

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

BMI = weight (kg) / height (m)². BMI Prime = BMI / 25.

In depth

Compute BMI Prime (BMI divided by the upper-normal threshold of 25), an at-a-glance ratio that tells you how far above or below normal a BMI is.