Ideal Weight Calculator

It is a clinical estimate of a healthy weight based on height and sex, and it is worth knowing where it came from: all four common formulas were developed for drug dosing, not for body goals. Devine wrote his in 1974 to calculate gentamicin doses. They were adopted as health targets afterwards, which is why they behave oddly when used that way.

None of them alone. They disagree by 3 to 4 kg at an average height and diverge further at the extremes, which tells you how much precision is really on offer. The average of the four is a reasonable midpoint, but the healthy BMI range is the more useful answer because it gives you a band of about 20 kg rather than a single number to hit.

They were built from different populations and disagree about how much weight each inch of height should add. Hamwi adds 2.7 kg per inch for men, Miller only 1.41. At 175 cm that spread is small, but at 195 cm Hamwi returns around 87 kg and Miller around 78. The taller or shorter you are, the more they part company.

No, and this is the formulas' clearest failure. They see only height and sex, so they cannot distinguish 80 kg of muscle from 80 kg of fat. A trained athlete will read as overweight on all four and on BMI too. If you carry meaningful muscle, body fat percentage and waist-to-hip ratio will tell you far more than any weight target.

18.5 to 24.9. Converted to weight at 175 cm that is 56.7 to 76.3 kg, a band of nearly 20 kg. That width is the point: healthy weight is a range, not a number, and where you sit within it depends on your build, muscle mass and what you can actually maintain.

Only if it happens to line up with something sustainable for you. Health outcomes track behaviours more reliably than they track a number on a scale: people who are active at a higher weight generally do better than sedentary people at a lower one. If your weight already sits inside the healthy BMI range, chasing a formula's midpoint is not worth much.