Monday, 17 Jun 2024

Calculating Ideal Weight

We live in a society that places a strong emphasis on body weight, particularly excess body fat. It’s important for each of us to strive for a weight range that corresponds to positive health outcomes. While measuring weight is a simple way to track changes and progress towards our weight goals, it doesn’t provide the complete picture. There are other factors, such as height and muscle mass, that should also be taken into consideration when determining ideal body weight.

Factors to Consider

When it comes to determining ideal body weight, height plays a significant role. Taller individuals are expected to weigh more due to their larger skeletal frame, muscle mass, and larger organs. To account for these differences, Weight for Height Tables have been developed. These tables provide a range of ideal weights based on various heights.

Muscle Mass Considerations

In addition to height, muscle mass is another important factor to consider. The commonly used Body Mass Index (BMI) doesn’t account for differences in muscle mass, making it less accurate for certain populations like the elderly or highly muscular individuals. Other calculations, such as the Broca Index, the Devine Formula, and the Peterson Equation, attempt to address these limitations. Additionally, the Ponderal Index and Adiposity Index are alternative methods for determining ideal body weight.

Ideal Body Weight Equations

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Here are some equations commonly used to calculate ideal body weight:

Broca, 1871

  • Metric: Wt (kg) = Ht – 100 cm

Hamwi, 1964

  • Men: Wt (lb) = 106 + 6 × (Ht – 60 in)
  • Women: Wt (lb) = 100 + 5 × (Ht – 60 in)

Devine, 1974

  • Men: Wt (kg) = 50.0 + 2.3 × (Ht – 60 in)
  • Women: Wt (kg) = 45.5 + 2.3 × (Ht – 60 in)

Robinson et al., 1983

  • Men: Wt (kg) = 52 + 1.9 × (Ht – 60 in)
  • Women: Wt (kg) = 49 + 1.7 × (Ht – 60 in)

Miller et al., 1983

  • Men: Wt (kg) = 56.2 + 1.41 × (Ht – 60 in)
  • Women: Wt (kg) = 53.1 + 1.36 × (Ht – 60 in)

Hammond, 2000

  • Men: Wt (kg) = 48 + 1.1 × (Ht – 150 cm)
  • Women: Wt (kg) = 45 + 0.9 × (Ht – 150 cm)

Peterson et al., 2016

  • US: Wt (lb) = 5 × BMI + (BMI ÷ 5) × (Ht – 60 in)
  • Metric: Wt (kg) = 2.2 × BMI + 3.5 × BMI × (Ht – 1.5 m)

Example Calculations

Let’s take a look at some example calculations to see how the different formulas can yield different results for ideal weight. For males who are 182 cm tall, the ideal weight estimates range from 72.9 kg to 82 kg. For females who are 167 cm tall, the estimates range from 61.4 kg to 60.3 kg.

Available Measures and Calculations

When it comes to measuring and calculating ideal body weight, there are several methods available, including:

  • Body Mass Measurement
  • Body Mass Index (BMI)
  • Broca Index
  • Devine Formula
  • Peterson Equation
  • Weight for Height Tables
  • Ponderal Index
  • Adiposity Index
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  1. How is ideal body weight calculated?

    • Ideal body weight can be calculated using equations such as the Broca Index, Devine Formula, or Peterson Equation. These formulas take into account factors like height and, in some cases, gender.
  2. What is the significance of muscle mass in determining ideal body weight?

    • Muscle mass is an important consideration as it can affect the overall weight and composition of the body. Individuals with higher muscle mass may have a different ideal weight than those with less muscle mass.
  3. Are there specific formulas for different populations, such as the elderly or athletes?

    • Yes, certain equations like the Peterson Equation attempt to account for differences in muscle mass and are more suitable for specific populations, such as the elderly or highly muscular athletes.


Determining ideal body weight goes beyond simple weight measurements. Factors such as height and muscle mass play a crucial role in the equation. Various formulas and calculations, such as the Broca Index, Devine Formula, and Peterson Equation, provide estimates for ideal weight. It’s important to consider individual circumstances and consult with healthcare professionals to determine the most appropriate weight goals for each individual.