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BMI Calculator
Check your Body Mass Index to find out if you're at a healthy weight. Switch between metric and imperial units.
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What is BMI?
Body Mass Index (BMI) is a person's weight in kilograms divided by the square of height in meters. It is an inexpensive and easy screening method for weight category—underweight, healthy weight, overweight, and obesity.
Metric Formula
BMI = weight (kg) / [height (m)]²
Imperial Formula
BMI = 703 × weight (lbs) / [height (in)]²
BMI Categories:
- Underweight: < 18.5
- Normal weight: 18.5 – 24.9
- Overweight: 25 – 29.9
- Obesity: BMI of 30 or greater
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