Ideal Body Weight | Ideal Body Weight Formula

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Ideal body weight

For patients at the extremes of body size, the calculated ideal body weight is a more clinically useful value for body weight than the measured weight. One common method is:

$\text{Males}:50\text{kg}+2.3\text{kg}\text{for}\text{every}2.54\text{cm}\text{over}152.4\text{cm}$

$\text{Females}:45\text{kg}+2.3\text{kg}\text{for}\text{every}2.54\text{cm}\text{over}152.4\text{cm}$

As this method is limited to patients over 5 feet tall and is known to underestimate ideal body weight for women, the BMI method can also be used by taking patient height and calculating the 19 to 21 BMI range (21–23 for women), giving an ideal weight range.9,15 In obese patients, the adjusted body weight provides another alternative,25,26 which may be beneficial:

$\text{Adjusted}\text{body}\text{weight}=\text{Ideal}\text{body}\text{weight}+0.4\left(\text{Current}\text{body}\text{weight}-\text{Ideal}\text{Body}\text{Weight}\right)$