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Biometric Screening

What Is BMI? A Simple Guide

Body Mass Index explained in clear, straightforward terms.

Learn what your number indicates and how healthcare providers interpret it.

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The Definition

A Ratio of Weight to Height

BMI stands for Body Mass Index. It is an inexpensive and easy screening method for weight category.

It compares your weight relative to your height squared.

Clinical Guideline

Adopted worldwide by the World Health Organization (WHO) and CDC.

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Clinical Role

A Screening Tool, Not a Diagnosis

BMI is a population-level screening metric. It does NOT directly measure body fat percentage.

Doctors use it as a starting point to assess potential risks for heart disease, type 2 diabetes, and hypertension.

Clinical Guideline

Athletes with high muscle mass may have an elevated BMI despite low body fat.

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Standard Cutoffs

Standard Adult Categories

These categories apply to men and women aged 20 and older.

  • Underweight: Below 18.5
  • Healthy Weight: 18.5 – 24.9
  • Overweight: 25.0 – 29.9
  • Obesity Class 1+: 30.0 and above
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Take Action

Check Your BMI Instantly

Enter your height in feet/inches or cm and your weight to get your exact BMI, healthy weight range, and Prime ratio.

Clinical Guideline

Educational tool only. Consult your physician for medical advice.

Educational tool only. Does not replace individualized clinical diagnosis.

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