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BMI Calculator

Calculate Body Mass Index from height and weight in metric or imperial units.

Enter your height and weight.

What is BMI Calculator?

BMI Calculator computes your Body Mass Index from your height and weight using either metric (kg/cm) or imperial (lb/in) units. BMI is a simple screening tool used by health professionals to classify weight categories.

BMI categories

  • Under 18.5 EUnderweight
  • 18.5  E24.9 ENormal weight
  • 25.0  E29.9 EOverweight
  • 30.0 and above EObese

Notes

  • BMI does not directly measure body fat. Athletes and muscular individuals may have a high BMI despite low body fat.
  • BMI thresholds may differ by age, sex, and ethnicity. Consult a healthcare professional for personalized assessment.
  • This tool is for informational purposes only and is not a substitute for medical advice.

FAQ

What is the BMI formula?
Metric: BMI = weight (kg) / height (m)². Imperial: BMI = 703 ÁEweight (lb) / height (in)².
Is BMI accurate for children?
No. For children and teens, BMI is age- and sex-specific and interpreted using growth percentile charts, not the adult cutoff values.
Why is my BMI high even though I exercise?
BMI does not distinguish between muscle and fat mass. Highly muscular individuals often have an "overweight" or "obese" BMI while having healthy or low body fat percentages.

Overview

Calculate BMI from height and weight as a quick body-mass reference. Suitable for screening, not diagnosis.

How to use

  1. Enter height and weight.
  2. Run BMI calculation.
  3. Check numeric BMI and category.

Examples

Notes

FAQ

Is BMI enough for health judgment?
No, use it with other indicators and clinical advice.
Why category feels inaccurate for athletes?
BMI does not distinguish fat and muscle mass.
Can I use decimal values?
Yes, decimal input is supported.
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