BMI Calculator
Calculate your Body Mass Index (BMI) to understand your weight category. Simply enter your weight and height.
Your BMI result and category will appear here.
BMI Categories
| Category | BMI Range | Health Risk |
|---|---|---|
| Underweight | Less than 18.5 | Low (potential nutrient deficiency) |
| Normal weight | 18.5 – 24.9 | Lowest (healthy range) |
| Overweight | 25 – 29.9 | Increased |
| Obese | 30 or higher | High |
What is BMI?
Body Mass Index (BMI) is a simple calculation using your height and weight. It helps assess if you have a healthy body weight for your height.
The formula is: BMI = weight (kg) ÷ height² (m). It provides a quick screening tool but doesn't measure body fat directly.
How to Use This Calculator
- Enter your weight in kilograms (kg)
- Enter your height in centimeters (cm)
- Click "Calculate BMI" button
- Review your result and category
- Check the BMI categories table for reference
BMI Limitations
- Doesn't account for muscle mass (athletes may show as overweight)
- Doesn't consider body fat distribution
- May not be accurate for pregnant women, elderly, or children
- Should be used as a screening tool, not a diagnostic tool
Frequently Asked Questions
What is a healthy BMI range?
For most adults, a BMI between 18.5 and 24.9 is considered healthy. This range is associated with the lowest risk of health problems.
Is BMI accurate for athletes?
BMI may overestimate body fat in athletes and muscular individuals because it doesn't distinguish between muscle and fat weight.
How often should I check my BMI?
You can check every few months if you're monitoring weight changes. For general health, focus on healthy habits rather than frequent BMI checks.
Can children use this calculator?
This calculator is for adults. Children and teens need age and gender-specific charts as their bodies are still developing.
What if my BMI is outside the normal range?
Consult with a healthcare professional. They can assess your overall health and provide personalized recommendations.