BMI Calculator
Calculate adult BMI from height and weight, show the CDC adult category, and explain why BMI is a screening measure rather than a diagnosis.
Enter or adjust the values above, then calculate.
What your BMI number means — and what it does not
Calculate adult BMI from height and weight, show the CDC adult category, and explain why BMI is a screening measure rather than a diagnosis.
Inputs this tool uses
- Height
- Weight
What you get
BMI 24.2 — Healthy weight
How to use the BMI Calculator
- Enter height, weight.
- Select any method, activity level or option shown on this page, then choose Calculate.
- Read the main result together with the supporting values, method, assumptions and limitations below before using the estimate.
How this calculation works
BMI is weight in kilograms divided by height in metres squared. Adult category labels follow current CDC adult BMI bands.
Example calculation
The sample values loaded into the calculator produce 24.2. This example exists to show how the output is structured; replace the sample values with your own inputs for your calculation.
Assumptions and limitations
- Anthropometric formulas are estimates and can differ from direct clinical measurements.
- Results are educational screening/reference values and do not diagnose health conditions.
Sources and review status
Source set last verified 2026-09-25. No clinician review is claimed unless a real named reviewer is displayed.
Questions people ask about BMI Calculator
Is BMI the same as body-fat percentage?
No. BMI uses only height and weight. It is a population-level screening measure and does not directly measure body fat, muscle mass or health.
What BMI range is considered healthy for adults?
CDC adult categories use 18.5–24.9 as the healthy-weight BMI range. The range is a screening reference, not a personal diagnosis or ideal weight.
Connected tools
Continue with the closest related calculation without re-entering sensitive values automatically.
Estimate the adult body-weight range corresponding to BMI 18.5–24.9 for a supplied height.
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