1. What is BMI?

Body Mass Index (BMI) is a simple index of weight-for-height that is commonly used to classify underweight, normal weight, overweight and obesity in adults. It is defined as the weight in kilograms divided by the square of the height in meters (kg/m²).

2. US Army BMI Standards

The US Army has specific BMI requirements for enlistment and service:

• 18.5-24.9: Ideal range for military service
• 25-27.5: May require additional body fat assessment
• Above 27.5: May be disqualified from service

3. How BMI is Calculated

The calculator uses the standard BMI formula:

Example: For a man weighing 80 kg and 1.75 m tall:
BMI = 80 / (1.75 × 1.75) = 26.1 kg/m²

4. Using the Calculator

Tips: Enter weight in kilograms and height in meters. For height in feet/inches, first convert to meters (1 foot = 0.3048 meters, 1 inch = 0.0254 meters).

5. Frequently Asked Questions (FAQ)

Q1: Why does the Army use BMI?
A: BMI provides a quick screening tool for weight categories that may lead to health problems or affect physical performance.

Q2: Are there exceptions to BMI requirements?
A: Yes, individuals with high muscle mass may receive waivers after body fat percentage assessment.

Q3: How accurate is BMI for athletes?
A: BMI may overestimate body fat in muscular individuals and underestimate it in older people with less muscle mass.

Q4: What's the minimum BMI for Army enlistment?
A: Generally 18.5, though waivers may be possible down to 17 in some cases.

Q5: Does the Army use different standards for women?
A: Yes, women typically have slightly higher body fat percentages at the same BMI compared to men.