BMI for Women: Calculating a Healthy BMI at 40 (150 lbs)

Body Mass Index (BMI) is a screening tool that uses weight and height to estimate body fat. The formula is:

BMI = weight (kg) ÷ [height (m)]²

Example Calculation

For a 40-year-old woman weighing 150 lbs (68.04 kg) and standing 5'4" (1.63 m):

BMI = 68.04 ÷ (1.63)² = 68.04 ÷ 2.6569 ≈ 25.6

Interpretation

• Underweight: BMI < 18.5
• Normal weight: BMI 18.5–24.9
• Overweight: BMI 25–29.9
• Obesity: BMI ≥ 30

A BMI of 25.6 falls into the overweight category. However, BMI does not distinguish between muscle and fat, nor does it account for fat distribution. For a complete health assessment, consult a healthcare provider who can evaluate body composition, waist circumference, and other risk factors.