The ideal weight for a girl, according to the Hamwi method, is calculated based on her height. Specifically, the formula is: Female ideal body weight = 45.4 kilograms (100 lb) + 0.9 kilograms (2.0 lb) × (height (cm) − 152). This means the ideal weight is not a single fixed number but a range depending on height.
Ideal Weight Calculation Using the Hamwi Method
The Hamwi method provides a framework to estimate ideal body weight, taking into account height. Let's break down how to apply this to girls:
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Base Weight: The calculation starts with a base weight of 45.4 kg (100 lb).
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Height Adjustment: For every centimeter over 152 cm, you add 0.9 kg (2.0 lb) to the base weight. If a girl is shorter than 152 cm, you subtract the weight from the base weight.
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Example:
Girl's Height (cm) Height Difference (cm) Weight Adjustment (kg) Ideal Body Weight (kg) 152 0 0 45.4 160 8 7.2 52.6 170 18 16.2 61.6
Understanding the Context
It's important to note a few things about this calculation:
- "Ideal" Weight: The weight calculated using the Hamwi method is considered an ideal, or healthy, target weight. It does not reflect the average weight for all girls; rather, it is a suggestion for a healthy weight based on height.
- Individual Variation: Individual factors such as muscle mass, bone density, and body composition are not considered, making it a general guideline only. A girl with a high muscle mass may weigh more than this ideal weight and still be healthy.
- Consult a Professional: For personalized and accurate assessment, it is best to consult a healthcare professional.
Key Takeaways
- The ideal weight for a girl is not a single number but depends on her height.
- The Hamwi method provides a formula for estimating ideal body weight: 45.4 kg + 0.9 kg × (height in cm – 152)
- This is a guideline, not a definitive answer, and variations due to body composition are not accounted for.
