What is the ideal weight? The answer depends on who you ask. There isn't one single number, but rather a healthy weight range that depends on sex, height, and body frame.
In this article, we compare four established formulas, explain their strengths and weaknesses, and show you how to interpret your personal ideal weight.
Four Formulas Compared
There is no universal formula for ideal weight. Instead, scientists have developed various approaches over the decades:
Devine Formula (1974)
Originally developed for medication dosing, it is now the most commonly used formula. Men: 50 kg + 2.3 kg per inch over 5 feet. Women: 45.5 kg + 2.3 kg per inch over 5 feet.
Robinson Formula (1983)
An evolution of the Devine formula with adjusted coefficients. Considered more realistic for the general population.
Miller Formula (1983)
Tends to produce higher values than the other formulas and is particularly suitable for taller individuals.
Hamwi Formula (1964)
The oldest of the four formulas. Frequently used in clinical nutritional counseling. Slightly higher values for men, slightly lower for women.
Why There Is No Single Ideal Weight
Each formula produces a different value. This is because they are based on different population data. The best approach: Calculate the average of all formulas and consider the entire range as a healthy span.
Additionally, the healthy BMI range (18.5 – 24.9) helps put your result in context. A weight within this range is considered safe according to the WHO.
Calculate your ideal weight now
Four formulas compared — free and no sign-up required.
Calculate for free now →Ideal Weight vs. BMI
BMI and ideal weight measure different things. BMI classifies your current weight; ideal weight shows you a target value. Together they provide a more complete picture.
It gets even more accurate when you also know your body fat percentage — because muscle weighs more than fat.
Conclusion
Ideal weight is not a fixed number but a range. Use our Ideal Weight Calculator as guidance and combine the result with your BMI and body fat percentage.
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