BMI Calculator — Body Mass Index

Underweight Health Concerns

BMI below 18.5 may indicate malnutrition or underlying health conditions. Risks include weakened immune system, osteoporosis, fertility issues, and nutrient deficiencies. Consult a healthcare provider for persistent underweight status.

Normal Weight Benefits

BMI between 18.5 and 24.9 correlates with lowest health risks. People in this range typically have lower rates of heart disease, diabetes, and certain cancers. Maintain through balanced diet and regular exercise.

Overweight and Obesity Risks

Higher BMI increases risk of type 2 diabetes, heart disease, stroke, certain cancers, sleep apnea, and joint problems. Even modest weight loss of 5-10 percent improves health markers significantly.

Muscle Mass Consideration

BMI does not distinguish between muscle and fat. Athletes and bodybuilders may have high BMI despite low body fat. Consider body composition measurements for accurate assessment.

Age and Gender Factors

Older adults naturally lose muscle mass. Women typically have higher body fat than men at the same BMI. BMI percentiles are used for children and teens instead of adult categories.

Ethnic Variations

Health risks vary by ethnicity at the same BMI. Asian populations face higher diabetes risk at lower BMI. Some groups have different body fat distribution patterns affecting health outcomes.

Better Assessment Methods

Combine BMI with waist circumference, body fat percentage, blood pressure, cholesterol levels, and blood sugar for comprehensive health assessment. These measurements provide clearer risk profiles.