Reading a BMI Chart: Step-by-Step Guide

A BMI chart cross-references height and weight to give BMI category.

Steps

1. Find height on vertical axis (left/right) — cm or inches.
2. Find weight on horizontal axis (top/bottom) — kg or lbs.
3. Locate intersection of height row and weight column → BMI value.
4. Read category by color/label:
   • Underweight: <18.5
   • Normal: 18.5–24.9
   • Overweight: 25–29.9
   • Obesity I: 30–34.9
   • Obesity II: 35–39.9
   • Obesity III: ≥40

Caveats

• Chart assumes standard adult proportions
• Not for children (use CDC growth charts)
• Does not account for muscle, frame, ethnicity
• Confirm with calculated BMI for precision

Action

If outside normal range, consult healthcare provider for personalized assessment and plan.