BMI Calculator
Check your Body Mass Index to assess your weight status.
Your BMI is
Your category is Normal
| Category | BMI Range |
|---|---|
| Underweight | < 18.5 |
| Normal weight | 18.5 – 24.9 |
| Overweight | 25 – 29.9 |
| Obesity | ≥ 30 |
How to Use the BMI Calculator
- Select Units: Choose between "Metric" (kilograms and centimeters) or "Imperial" (pounds, feet, and inches) units.
- Enter Your Details: Fill in your height and weight in the corresponding fields.
- Calculate: Click the "Calculate BMI" button to see your result.
- Interpret Results: The tool will display your BMI value, the corresponding weight category (e.g., Normal, Overweight), and a visual gauge showing where you fall on the BMI spectrum. The relevant category will also be highlighted in the table.
About Our Free BMI Calculator
Body Mass Index (BMI) is a widely used measure for assessing whether your weight is healthy in proportion to your height. It's a valuable screening tool that can help identify potential weight problems in adults. Our BMI calculator makes it easy to find your number and understand what it means, supporting both metric and imperial units for your convenience.
The calculation is based on the standard BMI formulas. The results are presented with a clear category, a visual gauge for quick interpretation, and a reference table of BMI categories. It's important to remember that while BMI is a useful indicator, it's not a diagnostic tool. It doesn't distinguish between fat and muscle mass, which can sometimes be misleading for athletes or individuals with high muscle mass. Always consult a healthcare professional for a comprehensive health assessment.
Frequently Asked Questions (FAQ)
What is a healthy BMI range?
For most adults, a healthy BMI is between 18.5 and 24.9. A BMI below 18.5 is considered underweight, between 25 and 29.9 is overweight, and 30 or above is categorized as obesity. These are general guidelines and may vary based on specific populations.
Is BMI accurate for everyone, including children and athletes?
No, BMI has limitations. For children and teens, BMI is interpreted using age- and sex-specific percentile charts. For athletes or bodybuilders with high muscle mass, BMI may be high even if their body fat is low, as muscle is denser than fat. It's a screening tool, not a definitive measure of body fat or health. A healthcare provider can offer a more complete picture.
How is BMI calculated?
The formula depends on the units used. For Metric units: BMI = weight (kg) / [height (m)]². For Imperial units: BMI = 703 × weight (lbs) / [height (in)]². Our calculator handles these conversions for you automatically.