BMI Calculator
Knowing whether your weight is healthy is very important for your overall well-being. Our free BMI Calculator helps you quickly check if your weight is ideal based on your height, gender, and age. Just enter your values and get instant results with proper health category.
What is BMI?
BMI (Body Mass Index) is a health measurement that helps you understand whether your weight is healthy according to your height and gender. It is widely used by doctors to check health risks.
BMI Formula
If height is in cm: Height(cm) ÷ 100 = Height(m)
BMI Categories (Adults)
| BMI Range | Category | Health Risk |
|---|---|---|
| Below 18.5 | Underweight | Possible malnutrition |
| 18.5 – 24.9 | Healthy Weight | Low risk |
| 25 – 29.9 | Overweight | Higher risk |
| 30 – 34.9 | Obesity Class 1 | High risk |
| 35 – 39.9 | Obesity Class 2 | Severe risk |
| 40+ | Obesity Class 3 | Very severe risk |
Male vs Female BMI
Men generally have more muscle mass while women have more body fat. That is why BMI may show slightly different results for both. Since this calculator includes gender input, it provides more accurate results.
BMI for Children and Teens
For people under 18, BMI is calculated differently. Their BMI depends on age + gender percentiles rather than only height and weight.
How to Use This BMI Calculator
- Select your gender
- Enter your height (cm or ft/in)
- Enter your weight (kg or lbs)
- Click on Calculate BMI
Your BMI result will show instantly with the health category.
Why Knowing Your BMI Matters
- Find out if your weight is healthy
- Check heart disease and diabetes risk
- Plan diet and fitness goals
- Track your health progress
Tips to Improve BMI
| If Underweight: Eat nutrient-rich high-calorie food, increase protein, exercise |
| If Overweight / Obese: Healthy calorie deficit diet, reduce sugar, walk/exercise daily |
| If Healthy: Keep balanced diet and stay active |
Limitations of BMI
- Does not measure body fat percentage
- May show high BMI for muscular people
- Not ideal for pregnant women