BMI Calculator – Body Mass Index for Adults & Children
Free online BMI Calculator. Calculate your Body Mass Index (BMI) and find out if you are underweight, normal, overweight, or obese. Includes BMI chart, formula, and health tips.
BMI Chart
| Category | BMI Range |
|---|---|
| Severe Thinness | 0 - 16 |
| Moderate Thinness | 16 - 17 |
| Mild Thinness | 17 - 18.5 |
| Normal | 18.5 - 25 |
| Overweight | 25 - 30 |
| Obese Class I | 30 - 35 |
| Obese Class II | 35 - 40 |
| Obese Class III | 40 - ∞ |
Welcome!
Curious about your health? Our BMI Calculator is here to help men and women check their Body Mass Index (BMI). Just enter your height and weight, and we'll instantly show you your BMI and what it means for you.
What is BMI?
BMI, or Body Mass Index, is a quick way to check if you're in a healthy weight range for your height. It's used by doctors and health experts worldwide, including the CDC and WHO, to screen for weight categories that may lead to health problems. The calculation and categories are the same for men and women.
How to Calculate BMI
BMI is easy to figure out. Here's how:
- Metric Units: BMI = weight (kg) / [height (m)]²
- US Units: BMI = 703 × weight (lbs) / [height (in)]²
BMI Categories (Adults)
| Classification | BMI Range (kg/m²) |
|---|---|
| Severe Thinness | < 16 |
| Moderate Thinness | 16 - 17 |
| Mild Thinness | 17 - 18.5 |
| Normal | 18.5 - 25 |
| Overweight | 25 - 30 |
| Obese Class I | 30 - 35 |
| Obese Class II | 35 - 40 |
| Obese Class III | > 40 |
Why does BMI matter?
Knowing your BMI can help you spot if you're at risk for health issues like heart disease, diabetes, or high blood pressure. It's a great first step toward a healthier you!
A quick tip:
BMI is a helpful tool, but it doesn't tell the whole story. Muscle, age, and body type all play a part. For a full picture of your health, chat with your doctor.
Frequently Asked Questions
FAQs
- Is BMI the same for men and women?Yes! For adults, BMI is calculated the same way for everyone. But remember, it doesn't account for muscle or body composition.
- What is a healthy BMI?A BMI between 18.5 and 25 is considered healthy for most adults, according to the CDC and WHO.
- Where can I learn more?Check out resources from the CDC (cdc.gov) or the World Health Organization (who.int) for more details on BMI and health.