Ideal Weight Calculator
Find your healthy weight range based on height and sex using multiple formulas.
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Ideal Weight Range
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Average across formulas
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Robinson Formula
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Miller Formula
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Devine Formula
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Healthy BMI Range
About the Ideal Weight Calculator
There is no single universally agreed ideal weight — it depends on body composition, frame size, age, and ethnicity. This calculator shows results from three widely used medical formulas: Robinson (1983), Miller (1983), and Devine (1974), along with the healthy BMI weight range for your height.
Which formula should I use?
The average of the three formulas gives a reasonable central estimate. The healthy BMI range (18.5–24.9) is the broadest guide and is recommended by the WHO. Use these numbers as a starting point for a conversation with a healthcare professional.
Frequently Asked Questions
How is ideal weight calculated?
Several formulas exist. Robinson (1983), Miller (1983), and Devine (1974) are the most commonly used. They are all based on height and sex. Our calculator shows results from all three formulas and their average.
What is a healthy BMI weight range?
The healthy BMI range (18.5–24.9) corresponds to a specific weight range for each height. We display this alongside the formula-based ideal weights for a complete picture.
Are ideal weight formulas accurate?
These formulas are estimates derived from population data. They do not account for body composition, frame size, or muscle mass. Use them as a rough guide rather than a strict target.
Does height affect ideal weight?
Yes, ideal weight increases with height. Most formulas add a fixed amount of weight per centimetre or inch above a base height value.