Enter your weight and height to calculate your Body Mass Index (BMI). You can switch between metric (kg/cm) and US units (lbs/in).
Body Mass Index (BMI) is a simple calculation that uses a person's height and weight to estimate body fat. It's a screening tool that can indicate whether a person is underweight, normal weight, overweight, or obese. BMI is calculated by dividing a person's weight in kilograms by the square of their height in meters.
BMI is categorized into different weight classes based on the calculated value. These categories help assess health risks associated with body weight.
BMI = weight (kg) ÷ (height in meters)²
BMI = 703 × weight (lb) ÷ (height in inches)²
May indicate malnutrition, eating disorders, or other health issues. Can lead to weakened immune system, osteoporosis, and fertility problems.
Generally indicates a healthy weight range. Associated with lower risk of chronic diseases and good overall health.
May increase risk of heart disease, diabetes, high blood pressure, and other health conditions. Consider lifestyle changes.
Moderate to high risk of health problems including heart disease, diabetes, high blood pressure, and sleep apnea. Lifestyle changes and medical monitoring recommended.
High risk of serious health complications including cardiovascular disease, diabetes, joint problems, and respiratory issues. Medical intervention strongly recommended.
Very high risk of life-threatening health conditions including severe cardiovascular disease, diabetes complications, and multiple organ system problems. Immediate medical attention required.
Our BMI Calculator provides a quick and easy way to calculate your Body Mass Index. This tool supports both metric and US units, making it accessible to users worldwide. The calculator uses standard BMI formulas and provides clear categorization of results. Remember that BMI is just one indicator of health and should be considered alongside other factors. Always consult with healthcare professionals for personalized health advice.
A healthy BMI typically falls between 18.5 and 24.9. This range is associated with the lowest risk of health problems.
BMI may not be accurate for athletes, pregnant women, the elderly, or people with certain medical conditions. It's best used as a screening tool rather than a definitive health measure.
You can check your BMI whenever your weight or height changes significantly. For most adults, checking every few months is sufficient.
If your BMI is outside the normal range, consider consulting with a healthcare professional. They can help you understand what this means for your health and provide personalized advice.
BMI calculations for children and teenagers are different from adults and should use age and gender-specific charts. This calculator is designed for adults aged 18 and older.