Ideal Weight Calculator

- May 09, 2025

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Calculate your ideal weight based on different formulas using your height, gender, and body frame. This calculator includes multiple scientifically-based formulas for comparison.

Personal Information

Gender:

Age:

Body Frame:

Height

Metric (cm)

Imperial (ft & in)

Height (cm):

Formula Selection

BMI Method (BMI = 22)

Devine Formula

Robinson Formula

Miller Formula

Hamwi Formula

Display Options

Show all weight units (kg, lbs, stones)

Show formula explanations

Decimal Places:

Your Ideal Weight Results

Height

170 cm (5'7")

Formula Explanations

BMI Method

The BMI method uses a BMI of 22 (considered optimal) to calculate ideal weight:

Ideal Weight = 22 × (Height in metres)²

This method is based on the Body Mass Index (BMI) formula and uses 22 as the target BMI, which is in the middle of the "normal weight" range (18.5-24.9).

Devine Formula

Developed by Dr. B.J. Devine in 1974, this formula is commonly used in clinical settings:

Male: Ideal Weight (kg) = 50 + 2.3 × (Height in inches - 60)

Female: Ideal Weight (kg) = 45.5 + 2.3 × (Height in inches - 60)

This formula accounts for gender differences and is valid for adults with height over 5 feet (60 inches).

Robinson Formula

Developed by J.D. Robinson in 1983, this formula is a modification of the Devine formula:

Male: Ideal Weight (kg) = 52 + 1.9 × (Height in inches - 60)

Female: Ideal Weight (kg) = 49 + 1.7 × (Height in inches - 60)

Robinson's formula typically gives slightly lower weights than Devine's formula.

Miller Formula

Created by Dr. D.R. Miller in 1983, this formula gives the lowest estimates:

Male: Ideal Weight (kg) = 56.2 + 1.41 × (Height in inches - 60)

Female: Ideal Weight (kg) = 53.1 + 1.36 × (Height in inches - 60)

Miller's formula is often used when a more conservative ideal weight estimate is preferred.

Hamwi Formula

Introduced by Dr. G.J. Hamwi in 1964, this is one of the earliest formulas:

Male: Ideal Weight (kg) = 48.0 + 2.7 × (Height in inches - 60)

Female: Ideal Weight (kg) = 45.5 + 2.2 × (Height in inches - 60)

Hamwi's formula typically gives the highest weight estimates and includes adjustments for frame size:
Small Frame: Subtract 10%
Large Frame: Add 10%

Important Notes

Ideal weight formulas provide estimates, not absolute targets.
These formulas don't account for muscle mass, body composition, or individual health factors.
Healthy weight ranges can vary significantly between individuals.
Consult with healthcare professionals for personalised weight recommendations.

About Ideal Weight

The concept of "ideal weight" refers to a weight range that is associated with optimal health outcomes based on a person's height, gender, age, and body frame. Various formulas have been developed to estimate this range.

Factors Affecting Ideal Weight

Height: Taller individuals generally have higher ideal weights.
Gender: Males typically have higher ideal weights due to greater muscle mass and bone density.
Body Frame: People with larger skeletal frames may have higher ideal weights.
Age: Optimal weight can change with age due to changes in muscle mass and metabolism.
Muscle Mass: Individuals with higher muscle mass may be healthy at weights above formula estimates.

Limitations of Ideal Weight Formulas

Most formulas were developed in the mid-20th century and may not reflect current health research.
They don't account for differences in body composition, ethnicity, or individual metabolic factors.
Athletic individuals with high muscle mass may be classified as "overweight" despite being healthy.
Weight alone is not a comprehensive indicator of health - other factors like blood pressure, cholesterol levels, and overall fitness are important.

Understanding the Ideal Weight Calculator

The Ideal Weight Calculator is a handy tool that helps you find out what your ideal weight should be based on your height, gender, and body frame. It uses various formulas that are backed by scientific research. This calculator is designed for anyone curious about their weight and how it relates to their Health.

The Benefits of Knowing Your Ideal Weight

Knowing your ideal weight can be useful for several reasons:

It helps you set realistic health goals.
You can track your progress over time.
It gives you a better understanding of your body’s needs.
It helps identify if you’re within a healthy weight range.

How to Use the Ideal Weight Calculator

Using the Ideal Weight Calculator is straightforward. You'll need to input some personal information such as your age, gender, and body frame size. Additionally, you can choose between metric and imperial units for your height. The calculator will then use the selected formulas to estimate your ideal weight range.

What Formulas Are Included?

This calculator includes several formulas to give you a well-rounded view of what your ideal weight could be. Some of the formulas featured are:

BMI Method
Devine Formula
Robinson Formula
Miller Formula
Hamwi Formula

Each of these formulas offers a different perspective on what a healthy weight might look like for you.

Understanding the Role of Height and Gender

Your height and gender play a significant role in determining your ideal weight. Generally, taller individuals may have a higher ideal weight. Additionally, men typically weigh more than women, primarily due to differences in muscle mass and bone density. The calculator accounts for these variations, making it a more personalised tool.

Why Body Frame Size Matters

Your body frame size can also influence what your ideal weight should be. The calculator allows you to select from small, medium, or large frames, and this distinction is important. Individuals with larger frames may naturally weigh more and still be considered healthy.

The Importance of Individual Health Factors

It's crucial to note that ideal weight calculations are just estimates and don’t take into account specific health factors. For example, muscle mass, body composition, and individual health conditions can significantly affect what might be a healthy weight for you. Always consider reaching out to a healthcare professional for tailored advice.

Final Thoughts on Using the Ideal Weight Calculator

The Ideal Weight Calculator is a valuable tool for anyone looking to understand their weight better. It provides insights based on various formulas and personal information. However, it’s just one piece of the puzzle when it comes to overall health. Always remember that personal well-being involves multiple factors and should be approached holistically.

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