Calculate Your BMI
Body Mass Index — weight relative to height
BMI Reference Ranges
Understanding BMI
Body Mass Index (BMI) is a simple measure of body fat based on height and weight that applies to adult men and women. While BMI is not a perfect indicator of health (muscle weighs more than fat, for example), it's a useful screening tool to identify potential weight-related health issues.
The BMI formula divides your weight in kilograms by your height in meters squared (kg/m²). A BMI of 18.5–24.9 is generally considered healthy, while values outside this range may indicate health risks.
Limitations of BMI
- • Muscle mass: Athletes may have high BMI despite being fit
- • Age: BMI doesn't account for age-related body composition changes
- • Bone density: Doesn't differentiate between bone, muscle, and fat
- • Individual variation: Doesn't consider individual genetic factors
What Your BMI Means
Underweight (BMI < 18.5)
May be associated with nutritional deficiencies. Consider consulting a healthcare provider.
Normal Weight (BMI 18.5–24.9)
Associated with lower health risks. Maintain with balanced diet and exercise.
Overweight (BMI 25–29.9)
May increase health risks. Consider lifestyle changes and professional guidance.
Obese (BMI ≥ 30)
Associated with increased health risks. Consult with a healthcare provider.
Next Steps
Use your BMI as one data point in understanding your health. Consider also calculating your TDEE to understand your daily calorie needs, and explore our other calculators for a more complete health picture.
Always consult with healthcare professionals for personalized advice specific to your situation.