BMI Calculator
Calculate your Body Mass Index — a baseline health metric used to categorize weight status. Supports metric and imperial units.
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Understanding BMI (Body Mass Index)
BMI is a simple screening tool that uses height and weight to estimate body fat. While it doesn't measure body fat directly, BMI correlates with more precise measurements and helps identify potential weight-related health risks.
BMI Categories
- Obese: BMI 30 or higher
- Overweight: BMI 25 to 29.9
- Normal weight: BMI 18.5 to 24.9
- Underweight: BMI below 18.5
BMI Limitations
BMI doesn't distinguish between muscle and fat. Athletes may have high BMI despite low body fat. Consider waist circumference, body fat percentage, and overall health markers for a complete picture.
FAQ
What is a healthy BMI?
A BMI between 18.5 and 24.9 is considered healthy for most adults. However, optimal BMI varies by age, sex, and muscle mass. Consult your doctor for personalized guidance.
How accurate is BMI?
BMI is a useful screening tool but has limitations. It may overestimate body fat in athletes and underestimate it in older adults. Use it alongside other measurements for best results.
Does BMI apply to children?
Children use age and sex-specific BMI percentiles rather than adult categories. A pediatrician can interpret your child's BMI correctly.