Question 1

What is ideal body weight and how is it calculated?

Accepted Answer

Ideal body weight (IBW) is an estimated weight range considered healthy for a person based on their height and gender. It's calculated using various formulas developed by researchers. The most common formulas include Devine (1974), Robinson (1983), Miller (1983), and Hamwi (1964). Each formula uses height as the primary factor, with different base weights and multipliers for men and women.

Question 2

Why do different ideal weight formulas give different results?

Accepted Answer

Different formulas were developed at different times by different researchers, each using different study populations and methodologies. The Devine formula is widely used in medicine for drug dosing, while others like Robinson and Miller were developed to better match actual body weights in various populations. The variation between formulas highlights that there is no single 'perfect' weight, but rather a healthy range.

Question 3

Which ideal weight formula is the most accurate?

Accepted Answer

No single formula is universally most accurate because ideal weight depends on many individual factors including body composition, muscle mass, bone density, and overall health. The Devine formula is most commonly used in clinical settings, particularly for medication dosing. For general health purposes, the healthy BMI range (18.5-24.9) is often considered a better indicator as it provides a weight range rather than a single number.

Question 4

Do ideal weight calculators account for muscle mass and body type?

Accepted Answer

Traditional ideal weight formulas do not account for muscle mass, body type, or body composition. They are based primarily on height and gender. Athletes, bodybuilders, and people with higher muscle mass may have healthy weights above what these formulas suggest. For a more complete assessment, consider using body composition measurements or consulting with a healthcare professional.

Question 5

Is ideal body weight the same as target weight for weight loss?

Accepted Answer

Not necessarily. Ideal body weight formulas provide a general health reference, but your target weight for weight loss should be personalized based on your current health status, medical conditions, lifestyle, and goals. A healthcare provider can help determine a realistic and healthy target weight. The healthy BMI range may be a better starting point for setting weight loss goals as it provides a range of acceptable weights.

Ideal Weight Calculator

Formula Results

Healthy BMI Weight Range

Understanding Ideal Body Weight

Formulas Used

The Formulas (for height in inches over 5 feet)