IBW Calculator (Ideal Body Weight)

Find out your ideal body weight for free in seconds

Ideal Body Weight Calculator

How to use IBW calculator

To use the ideal body weight calculator, you have to follow these steps:

Enter your height in centimeters, gender, and age in years in the respective fields.
Click on the “Calculate Ideal Weight” button.
The page will display the results for four different formulas to calculate ideal body weight, namely Robinson formula, Miller formula, Hamwi formula, and Devine formula.
Each formula provides a different result based on various factors, such as gender and height. It is recommended to take the average of all four results to get a more accurate estimate of your ideal body weight.
Note that the results are in kilograms (kg) and are rounded to one decimal place.

By using this ideal body weight calculator, you can get an estimate of the weight that is considered healthy for your height, gender, and age. It is important to remember that these formulas provide only an estimate, and the actual ideal body weight may vary depending on several other factors such as muscle mass, bone density, and body type. Therefore, it is always recommended to consult a healthcare professional before making any changes to your diet or exercise routine.

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IBW Formula

The ideal body weight calculator uses four different formulas to calculate the ideal body weight, namely Robinson, Miller, Hamwi, and Devine formulas. These formulas are based on different criteria such as gender, height, and age. For example, the Robinson formula is based on height alone, whereas the Miller formula takes into account both height and gender.

Robinson formula

This formula is based on the Metropolitan Life Insurance tables and is the most commonly used formula. It takes into account gender, height, and age. The equation for Robinson formula is:

For men: IBW = 52 + 1.9 x (height in inches – 60)

For women: IBW = 49 + 1.7 x (height in inches – 60)

Miller formula

This formula is also based on the Metropolitan Life Insurance tables and is similar to Robinson formula, but with slightly different coefficients. The equation for Miller formula is:

For men: IBW = 56.2 + 1.41 x (height in inches – 60)

For women: IBW = 53.1 + 1.36 x (height in inches – 60)

Hamwi formula

This formula is based on the 1964 study by G. J. Hamwi and takes into account only gender and height. The equation for Hamwi formula is:

For men: IBW = 48 kg + 2.7 kg for each inch over 5 feet

For women: IBW = 45.5 kg + 2.2 kg for each inch over 5 feet

Devine formula

This formula is based on the 1974 study by B. J. Devine and is similar to Hamwi formula, but with slightly different coefficients. The equation for Devine formula is:

For men: IBW = 50 kg + 2.3 kg for each inch over 5 feet

For women: IBW = 45.5 kg + 2.3 kg for each inch over 5 feet

Korean Ideal Body Weight

The term Korean Ideal Body Weight typically refers to the ideal body weight (IBW) standards commonly used in South Korea, which may differ slightly from Western formulas due to differences in average body composition, height, and cultural beauty standards.

There are two main contexts in which “Korean Ideal Body Weight” is used:

1. Medical/Health Context

In a clinical or nutritional setting, Korea may use variations of formulas like:

Korean IBW Formula (common version):

Men: (Height in cm − 100) × 0.9
Women: (Height in cm − 100) × 0.85

This formula is used by some Korean hospitals or diet clinics for assessing healthy weight, not necessarily aesthetic.

2. Cultural/Beauty Standards

In South Korean pop culture (especially in K-pop or media), the “ideal body weight” can be stricter and more appearance-focused, often favoring slimmer figures than medically necessary.

For example:

A K-pop trainee or idol might be expected to weigh 45–50 kg, even if their height suggests a higher healthy weight.
This “ideal” is often tied to looking thin on camera rather than actual health.

Example:

A 165 cm (5’5″) woman:

Medical ideal weight (Korean formula): (165 − 100) × 0.85 = 55.25 kg
Beauty ideal (pop culture): Often expected to weigh 48–50 kg

Summary:

Medical Korean IBW = Slightly modified version of standard formulas.
Cultural Korean IBW = Influenced by beauty ideals, often lower than the medically recommended weight.

Korean Ideal Body Weight Chart

Height (cm)	Ideal Weight (Men)	Ideal Weight (Women)
150	45.0 kg	42.5 kg
155	49.5 kg	46.75 kg
160	54.0 kg	51.0 kg
165	58.5 kg	55.25 kg
170	63.0 kg	59.5 kg
175	67.5 kg	63.75 kg
180	72.0 kg	68.0 kg
185	76.5 kg	72.25 kg
190	81.0 kg	76.5 kg