Calculating BMI for a Patient Who is 64 Inches Tall and Weighs 232.4 Pounds
The Body Mass Index (BMI) for a patient who is 64 inches tall and weighs 232.4 pounds is 39.9 kg/m², which classifies this individual as having Class II obesity. 1
BMI Calculation Method
- BMI is calculated as weight in kilograms divided by height in meters squared 1
- Converting measurements:
- Height: 64 inches = 1.63 meters
- Weight: 232.4 pounds = 105.4 kilograms
- BMI calculation: 105.4 kg ÷ (1.63 m)² = 105.4 ÷ 2.64 = 39.9 kg/m² 1
BMI Classification
- According to the World Health Organization classification used in clinical practice guidelines:
- BMI 25-29.99: Overweight
- BMI 30-34.99: Class I obesity
- BMI 35-39.99: Class II obesity
- BMI ≥40: Class III obesity 1
Clinical Significance of This BMI
- A BMI of 39.9 kg/m² indicates Class II obesity, which is associated with significantly increased health risks 1
- Individuals with obesity have higher rates of:
- Type 2 diabetes
- Hypertension
- Cardiovascular disease
- Sleep disorders
- Osteoarthritis 1
- In men with a BMI of 30-39, cardiovascular event rates are 20.21 per 1000 person-years compared with 13.72 per 1000 person-years in men with normal BMI 1
- In women with a BMI of 30-39.9, cardiovascular event rates are 9.97 per 1000 person-years compared with 6.37 per 1000 person-years in women with normal BMI 1
Important Considerations
- BMI alone is not recommended to determine individual risk; additional measures such as waist circumference can provide further risk stratification 1
- For Asian populations, lower BMI thresholds (≥25-27.5) are recommended for defining obesity due to higher cardiometabolic risk at lower BMI levels 1
- BMI has limitations as it does not directly measure adiposity or account for individual differences in muscle mass versus fat distribution 2, 3
- Waist circumference (≥102 cm for men and ≥88 cm for women) is recommended as an additional risk stratification tool for patients with BMI 25-34.9 1
Weight Management Implications
- For individuals with Class II obesity, an energy deficit of 500-1000 kcal/day is recommended to produce approximately 1-2 pounds of weight loss per week 1
- A 5-10% weight loss can improve systolic blood pressure by about 3 mm Hg for those with hypertension and may decrease hemoglobin A1c by 0.6-1% for those with type 2 diabetes 1
- Evidence-based obesity treatment includes interventions addressing behavioral interventions, nutrition, physical activity, pharmacotherapy, and potentially metabolic/bariatric procedures 1