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Understanding Ideal Body Weight (IBW)

Determining your ideal body weight (IBW) involves considering various factors such as height, sex, and muscle mass. The IBW calculator employs multiple formulas to provide a range of estimates, acknowledging the variability in individual circumstances.

Formulas for Men

For men, the IBW calculator uses several formulas:

  1. Robinson Formula:
    • 52 kg + 1.9 kg per inch over 5 feet.
  2. Miller Formula:
    • 56.2 kg + 1.41 kg per inch over 5 feet.
  3. Hamwi Formula:
    • 48.0 kg + 2.7 kg per inch over 5 feet.
  4. Devine Formula:
    • 50.0 kg + 2.3 kg per inch over 5 feet.
  5. Broca Formula:
    • Height [cm] – 100.
  6. Lorentz Formula:
    • (Height [cm] – 100) – (Height [cm] – 150)/4.

Formulas for Women

For women, the IBW calculator utilizes the following formulas:

  1. Robinson Formula:
    • 49 kg + 1.7 kg per inch over 5 feet.
  2. Miller Formula:
    • 53.1 kg + 1.36 kg per inch over 5 feet.
  3. Hamwi Formula:
    • 45.5 kg + 2.2 kg per inch over 5 feet.
  4. Devine Formula:
    • 45.5 kg + 2.3 kg per inch over 5 feet.
  5. Broca Formula:
    • Height [cm] – 100.
  6. Lorentz Formula:
    • (Height [cm] – 100) – (Height [cm] – 150)/2.

Peterson Formula

Additionally, the Peterson formula is applied, offering an alternative perspective:

  • (2.2 × target BMI) + (3.5 × target BMI × (height [m] – 1.5)).

This formula is independent of gender, with the default target BMI set at 22.

Body Mass Index (BMI) and Weight Range

The Body Mass Index (BMI) is a key indicator, calculated as weight/height². The optimal BMI range falls between 18.5 and 24.9. The IBW calculator converts BMI into a weight range, providing a practical interpretation for users.

Limitations and Considerations

While these formulas offer estimates, it’s crucial to acknowledge their limitations. The values are not universally applicable, and maintaining a BMI within the normal range is more significant than adhering strictly to a specific weight. The calculator is intended for adults only and not suitable for children or pregnant individuals.

Frequently Asked Questions (FAQ)

How to Calculate Ideal Body Weight in Pounds?

To calculate ideal body weight in pounds, the modified Devine formula is applied:

  • For men: 110.23 lb + 5.1 lb per inch over 5 feet.
  • For women: 100.3 lb + 5.1 lb per inch over 5 feet.

Which Ideal Body Weight Formula is Best?

The Devine formula is the most medically validated and widely used by physicians for drug dosage calculations.

What is the Ideal Weight for a Female?

The Devine formula for females provides an estimation in both kilograms and pounds, taking into account height.

What is the Ideal Weight Loss for a Month?

For safe and sustainable weight loss, aim for a pace of 0.25-0.5 kg (0.55-1.1 lb) per week, not exceeding 1-2 kg (2.2-4.4 lb) per month.

How Do You Calculate Your Ideal Body Weight?

Utilize the Devine formula, a straightforward calculation requiring only your height. This formula is widely accepted and validated in medical settings.