About This Calculator
This BMI Calculator helps you quickly calculate your Body Mass Index (BMI) based on your height and weight. It works with both metric units (cm, kg) and imperial units (ft/in, lb), giving you an instant result along with your BMI category.
How It Works
- Select your preferred unit system: Metric (cm, kg) or Imperial (ft/in, lb).
- Enter your height and weight in the appropriate fields.
- Click "Calculate" to see your BMI value and category.
The BMI is calculated by dividing your weight in kilograms by the square of your height in meters. For imperial units, the formula adjusts to account for pounds and inches.
BMI = weight (kg)height² (m)
BMI Categories
| BMI Range | Category |
|---|---|
| Less than 18.5 | Underweight |
| 18.5 - 24.9 | Normal weight |
| 25 - 29.9 | Overweight |
| 30 and above | Obesity |
Frequently Asked Questions
What is BMI?
BMI, or Body Mass Index, is a simple health indicator calculated from your height and weight to assess body fat levels.
What are the standard BMI categories?
Underweight (BMI < 18.5), Normal weight (18.5 - 24.9), Overweight (25 - 29.9), Obesity (30 and above).
Does BMI consider muscle mass?
No, BMI only reflects height and weight. It does not differentiate between fat and muscle.
Is BMI accurate for children?
This calculator is designed for adults. For children, consult specialized BMI-for-age charts.