See the ideal weight for your height by four classic formulas, next to the weight range for a BMI of 18.5 to 24.9.
An ideal weight for a given height is a number from a formula: a base weight for 5 feet (60 inches) plus a fixed amount for every inch above that, with separate numbers for men and women. This page uses four published formulas side by side. Devine (1974) is 50 kg for men and 45.5 kg for women plus 2.3 kg per inch. Robinson (1983) is 51.65 kg plus 1.85 kg per inch for men and 48.67 kg plus 1.65 kg per inch for women. Miller (1983) is 56.2 kg plus 1.41 kg per inch for men and 53.1 kg plus 1.36 kg per inch for women. Hamwi (1964) was published in pounds, 106 lb plus 6 lb per inch for men and 100 lb plus 5 lb per inch for women (48.1 kg plus 2.72 kg per inch and 45.4 kg plus 2.27 kg per inch). At 175 cm a man is 68.9 inches tall, 8.9 inches over 5 feet, so Devine gives 50 + 2.3 × 8.9 = 70.5 kg, Robinson 51.65 + 1.85 × 8.9 = 68.1 kg, Miller 68.7 kg and Hamwi 106 lb + 6 × 8.9 = 159.4 lb = 72.3 kg. The box under the answer repeats each step with your own height.
Each formula was fitted by a different author to a different idea of a desirable weight, so they give different answers, and the gap grows with height because each adds a different amount per inch. For the same man at 175 cm the spread is 68.1 to 72.3 kg, about 4 kg. The page shows the lowest and the highest as one range, and each formula on its own line, so you can see how wide the disagreement is rather than a single number that hides it. None of the four is more correct than the others. They are conventions, and they describe a statistical idea of a weight, not a weight that is right for one person.
The last line shows the weight at which a BMI falls between 18.5 and 24.9, the World Health Organization's normal weight band for adults. It is worked out as BMI × height in metres squared, so at 1.75 m it is 18.5 × 3.0625 = 56.7 kg to 24.9 × 3.0625 = 76.3 kg. This band is much wider than the formula results, and the formula results usually sit inside it. If you want the BMI itself, the BMI calculator on this site shows it with the category.
The formulas use only height and sex. They ignore age, frame size, muscle, bone density and ethnicity, and they were written in clinical settings, for example to scale drug doses, not as a target to aim for. Heights under 5 feet (60 inches) are outside what the formulas were built on, so the page continues the straight line downward and says so. Heights from 120 cm to 230 cm are accepted, and the page is for adults. The numbers are estimates worked out from what you type. They are not medical advice, and a health professional looks at much more than height.
For a man at 175 cm the four formulas give 68.1 to 72.3 kg (Robinson to Hamwi), and Devine gives 70.5 kg. For a woman at 175 cm they give 63.4 to 66.0 kg. The BMI 18.5 to 24.9 range at that height is 56.7 to 76.3 kg.
Devine (1974) is 50 kg plus 2.3 kg for every inch over 5 feet for men, and 45.5 kg plus 2.3 kg per inch for women. A man of 5 ft 9 in is 9 inches over, so 50 + 2.3 × 9 = 70.7 kg, which is 155.9 lb.
None is. Devine, Robinson, Miller and Hamwi are conventions fitted to different ideas of a desirable weight, and at 175 cm for a man they differ by about 4 kg. That is why this page shows all four and a range, not one answer.
Each formula starts at 60 inches and adds weight per inch above it. Below 60 inches the added amount is negative, so the page extends the same line downward and warns you. At 152 cm (59.8 in) the result is a straight extension, not a measured figure, so use it as a rough guide.
No. An ideal weight comes from a formula using height and sex only. A healthy weight depends on muscle, age, bone structure and medical history. The BMI band of 18.5 to 24.9 is a screening range, for example 56.7 to 76.3 kg at 175 cm, and neither one is a diagnosis.
No. The calculation runs in your browser and the height stays in this tab. It is not uploaded or stored on your device. Reloading the page puts the example back. The page only counts that a result was shown, without any of your numbers.