How BMI Uses Height and Weight
BMI is calculated from height and weight to estimate whether body weight is proportionate to height.
Quick Check
BMI Calculator by Height and Weight
Use your height and weight to calculate BMI instantly and see where your result falls in standard BMI categories.
Your BMI Result
Fill in your height and weight, then click calculate to view your BMI result and healthy weight range.
Height and Weight BMI Formula
Metric: BMI = weight (kg) ÷ height² (m²)
Imperial: BMI = (weight (lbs) ÷ height² (in²)) × 703
BMI Categories
| Category | BMI Range | Health Risk |
|---|---|---|
| Underweight | < 18.5 | Possible nutritional deficiency |
| Normal Weight | 18.5 – 24.9 | Low risk |
| Overweight | 25 – 29.9 | Moderate risk |
| Obese | ≥ 30 | High risk |
Frequently Asked Questions
The Body Mass Index (BMI) is a screening tool used to identify whether an adult is underweight, at a healthy weight, overweight, or obese. It is calculated by dividing a person’s weight in kilograms by the square of their height in meters.
You only need your height and weight.
Yes. This BMI calculator supports both systems.
BMI adjusts weight relative to height by dividing weight by height squared.
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