About Ideal Weight Calculator

What is Ideal Weight?

Ideal body weight (IBW) is an estimated weight range that is considered healthy for a given height. Several clinical formulas have been developed by medical researchers to estimate ideal weight, each with slightly different approaches and target populations.

Clinical Formulas

Our calculator uses four clinically validated formulas developed by medical researchers: Devine (1974), Hamwi (1964), Robinson (1983), and Miller (1983). These formulas were originally designed for clinical dosage calculations and nutritional assessments.

BMI-Based Approach

In addition to clinical formulas, we provide a BMI-based healthy weight range using the World Health Organisation's standard BMI classification. A BMI between 18.5 and 25.0 is generally considered healthy for most adults.

Understanding Limitations

Ideal weight formulas are general estimates and do not account for individual factors such as muscle mass, bone density, body frame size, or age. They should be used as a reference point, not as a definitive health goal. Always consult with your healthcare provider for personalised advice.

How to Use

Select Your Sex

Choose male or female, as the formulas calculate different ideal weights based on biological sex.

Enter Your Height

Height

View Results

See your ideal weight calculated using four clinical formulas, along with a BMI-based healthy weight range.

Review Steps

Check the detailed calculation steps to understand how each formula arrives at its result.

Frequently Asked Questions

Which ideal weight formula is the most accurate?

There is no single "most accurate" formula. Each formula was developed for different purposes and populations. The Devine formula is the most widely used in clinical settings. We recommend looking at the average across all four formulas and the BMI-based range for a more comprehensive picture.

Why do different formulas give different results?

Each formula was developed by different researchers using different reference populations and methodologies. The variations are typically small and all fall within a healthy range. The differences reflect the natural diversity of healthy body compositions.

Is ideal weight the same as a healthy weight?

Not exactly. Ideal weight formulas provide a single estimate, while a healthy weight range (like the BMI-based range) gives a broader spectrum. Many factors beyond height and sex influence what weight is healthy for you, including muscle mass, bone density, age, and overall health status.

Can I use this calculator if I am very tall or short?

The formulas were originally designed for adults of average height (around 5 feet / 152 cm and above). Results may be less accurate for very short or very tall individuals. The BMI-based range may be more useful in these cases.

Should I try to reach my ideal weight exactly?

No. The ideal weight is an estimate and should be used as a general reference. A healthy lifestyle focused on balanced nutrition and regular physical activity is more important than hitting a specific number. Consult your healthcare provider for personalised guidance.

Ideal Weight Calculator

Personal Information

Quick Examples:

Your Ideal Weight Result

Formula Results

BMI-Based Healthy Weight Range

Calculation Steps

Enter Your Information