The question “how much should I weigh” is one of the most common in the health and fitness world, but the answer isn’t a single number that applies to everyone. Optimal body weight depends on height, sex, and body frame, and several scientifically recognized formulas estimate this value in different ways.
How the Optimal Body Weight Calculator Works
Our calculator uses several well-known formulas side by side, giving users a range of values instead of one rigid number:
- Robinson formula (1983) – one of the most commonly used, based on height with a base value of 52 kg for men and 49 kg for women at 152 cm, plus an addition for every centimeter above that
- Miller formula (1983) – similar to Robinson’s, but with slightly different coefficients
- Devine formula (1974) – originally developed for medical purposes (drug dosing), now one of the most widely used in clinical practice
- Hamwi formula (1964) – one of the oldest, frequently used in nutrition science
The calculator takes the user’s height and sex, calculates a value using each formula, and displays the average along with the full range of results.
What the Result Shows
Instead of a single number, the user gets a range — for example, 65-70 kg for a man who is 175 cm tall. This range represents a theoretical “healthy” body weight window, but it doesn’t account for individual differences in bone and muscle structure, so it should be treated as a general reference rather than a strict rule.
People with more developed muscle mass, such as athletes, often weigh above the calculated “optimum,” which doesn’t mean they carry excess fat — on the contrary, muscle tissue is denser than fat tissue at the same volume.
Why Use Multiple Formulas Instead of One
Each of these formulas was developed in a different era and for a different purpose — some for medical use, others for general population estimates. By showing a range instead of a single number, the calculator gives users a more realistic picture, avoiding the false sense of precision that could create unnecessary pressure or unrealistic expectations about appearance or the number on the scale.
Optimal body weight is best viewed alongside other indicators like body fat percentage and overall energy and health, rather than treated as a goal in isolation. CALCULATE HERE
