BMI Calculator - Body Mass Index Calculator
Calculate your BMI (Body Mass Index) for free. Understand what your BMI means and how to interpret the results. Learn about healthy weight ranges and BMI categories.
BMI Calculator
BMI Categories
What is BMI?
Body Mass Index (BMI) is a measure of body fat based on height and weight that applies to adult men and women. It's a simple calculation that helps assess whether you're at a healthy weight for your height.
Why BMI Matters
BMI is widely used as a screening tool to identify potential weight problems. While it doesn't directly measure body fat, it correlates with direct measures of body fat and can help identify health risks associated with being underweight, overweight, or obese.
How to Calculate BMI
Metric
BMI = weight (kg) / height (m)²
Imperial
BMI = (weight in pounds × 703) / (height in inches)²
BMI is calculated by dividing your weight in kilograms by your height in meters squared. For imperial units, multiply weight in pounds by 703, then divide by height in inches squared.
BMI Categories
Limitations of BMI
BMI doesn't account for muscle mass, bone density, overall body composition, or racial and sex differences. Athletes with high muscle mass may have a high BMI but low body fat. Older adults may have a normal BMI but higher body fat percentage.
Frequently Asked Questions
What is a healthy BMI?
A healthy BMI typically falls between 18.5 and 24.9. However, individual factors like muscle mass, age, and overall health should be considered.
Can BMI be inaccurate?
Yes, BMI doesn't distinguish between muscle and fat, so athletes or very muscular individuals may have a high BMI despite being healthy.
Should I use BMI alone to assess my health?
No, BMI should be used as one tool among many. Consider other factors like waist circumference, body composition, and overall health markers.
Disclaimer: These calculators provide estimates for educational purposes only and are not a substitute for professional medical advice. Please consult a healthcare provider for personalized guidance.