IBW Calculator (Ideal Body Weight)

Find your ideal body weight (IBW) using the classic formulas (Devine, Hamwi, Miller, Robinson)—then turn that number into action with a free customized meal plan, macros guidance, and an at-home workout routine. This page explains your result, what it means for fat loss or muscle gain, and the simplest way to start today.

Quick reminder: IBW is a guide, not a diagnosis. It doesn’t measure body fat, muscle, or health markers. Use it to set direction, then tailor your plan.

Contents

1 Check This Ideal Body Weight Calculator
2 What Happens After You Calculate Your Ideal Body Weight
3 How to use IBW calculator
4 What Your IBW Result Means for Nutrition
- 4.1 Why Protein Matters
- 4.2 Foods That Make IBW Goals Easier
5 IBW Formula
6 Ideal Body Weight Chart
- 6.1 🎯 Stay On Track with Our Fitness Tracker
7 Korean Ideal Body Weight
8 Korean Ideal Body Weight Calculator
9 Before Starting Hard Diets
10 Struggling with unsustainable diets and frustrated by the lack of results?
- - 10.0.1 Check out more calculators

Check This Ideal Body Weight Calculator

What Happens After You Calculate Your Ideal Body Weight

Once you receive your IBW result, the next steps depend on where you fall relative to the estimated range.

If You Are Above Your IBW

This usually means your body is storing more fat than it needs. The most effective and scientifically supported approach to fat loss is:

A moderate calorie deficit (not starvation)
A high-protein diet to support lean muscle
Strength training 2–4 times per week
Daily steps or light activity to raise calorie burn gently

Crash diets are counterproductive. Sustainable fat loss is slow and steady.

If you want a structured starting point:
→ Get your free customized meal plan here:

Free Customized Meal Plans

If You Are Below Your IBW

This may mean:

Your calorie intake is too low,
You have low muscle mass,
Or your body is under-fueled for activity.

To gain healthy weight:

Increase calories gradually,
Focus on protein + complex carbs,
Strength train progressively (increase weight over time).

If You Are Already Near Your IBW

Focus on:

Maintaining a balanced diet
Stable activity levels
Tracking your progress weekly (not daily)

This is the recomposition zone, where you may stay the same weight while improving strength and muscle tone.

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.

What Your IBW Result Means for Nutrition

Your diet structure will vary depending on your goal, but the most universally effective approach is balanced macros, especially protein.

Why Protein Matters

Protein supports:

Metabolism
Muscle repair and growth
Hormonal balance
Appetite control

Most people aiming for healthy weight management do well with:
1.6–2.2 g of protein per kg of body weight per day

Example:
Someone weighing 70 kg might aim for 110–150 g of protein daily.

Foods That Make IBW Goals Easier

High-protein options:

Chicken breast, turkey, tuna, salmon
Greek yogurt, eggs, cottage cheese
Lentils, chickpeas, tofu, edamame
Whey or plant-based protein powder (easy macro boost)

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

Ideal Body Weight Chart

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.

Check out 11 Lowest Calorie Vegetables to Insure Weight Loss

Height (cm)	Ideal Body Weight — Male (kg)	Ideal Body Weight — Female (kg)
150 cm	50.0 kg	45.5 kg
155 cm	52.4 kg	47.9 kg
160 cm	56.9 kg	52.4 kg
165 cm	61.4 kg	56.9 kg
170 cm	65.9 kg	61.4 kg
175 cm	70.5 kg	66.0 kg
180 cm	75.0 kg	70.5 kg
185 cm	79.5 kg	75.0 kg

🎯 Stay On Track with Our Fitness Tracker

You’ve just calculated your ideal weight—now it’s time to take action! Our Weekly Fitness Tracker (1 Month) helps you set goals, log your workouts, and track your weekly progress, all in one easy-to-use digital format.

Get the Tracker

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