BMI Calculator
BMI Range
“Easily calculate your Body Mass Index (BMI) using this free online BMI calculator. Check if you’re underweight, normal, overweight, or obese.”
What is BMI (Body Mass Index)?
Body Mass Index (BMI) is a simple calculation that helps determine whether your weight is within a healthy range for your height. It is widely used by health professionals as a quick screening tool to categorize individuals as underweight, normal weight, overweight, or obese.
The formula for BMI is: BMI = weight (kg) / [height (m)]² or in US units: BMI = 703 × weight (lbs) / [height (in)]².
BMI Categories
| Category | BMI Range | Health Risk |
|---|---|---|
| Underweight | Below 18.5 | Possible nutritional deficiency |
| Normal weight | 18.5 – 24.9 | Low risk (healthy range) |
| Overweight | 25 – 29.9 | Increased risk of heart disease |
| Obese (Class I) | 30 – 34.9 | High risk |
| Obese (Class II) | 35 – 39.9 | Very high risk |
| Obese (Class III) | 40+ | Extremely high risk |
How to Interpret Your BMI
A BMI within the range of 18.5 to 24.9 is considered healthy. Values below 18.5 indicate that you may be underweight, while values above 25 suggest you may be overweight or obese. However, BMI does not directly measure body fat percentage and may not be accurate for athletes or people with high muscle mass.
It’s best used as a general guide rather than a diagnostic tool. For more precise insights, consider measuring your body fat percentage or consulting a healthcare professional.
Frequently Asked Questions (FAQ)
1. What is a healthy BMI?
A healthy BMI is typically between 18.5 and 24.9. This range indicates that your weight is appropriate for your height.
2. Is BMI the same for men and women?
Yes, BMI uses the same calculation for both men and women. However, body composition (muscle vs. fat) can vary significantly.
3. Can BMI be inaccurate?
BMI may not accurately represent body fat for athletes, children, or older adults. It’s a useful screening tool, but not a perfect measure of health.
4. What should I do if my BMI is high?
Consider lifestyle changes such as a balanced diet, regular exercise, and consulting your doctor or nutritionist for personalized advice.