About this ideal weight calculator
Estimate a general reference body weight from height using the Devine formula, a method originally published in 1974 and still widely cited for drug-dosing and clinical reference calculations. Enter a height and select male or female, since the formula uses a different starting point for each, and see the estimated ideal weight in both kilograms and pounds. This is a population-level reference point, not a personal target: healthy weight depends on frame size, muscle mass, age, and many other factors this simple formula does not consider.
How it works
Devine formula: for men, 50 kg plus 2.3 kg for each inch of height over 5 feet; for women, 45.5 kg plus 2.3 kg for each inch over 5 feet. Height is converted from centimeters to inches above the 5-foot mark before applying the multiplier.
Try these examples
180 cm, male
Ideal weight 74.99 kg (165.33 lb)
165 cm, female
Ideal weight 56.91 kg (125.46 lb)
Limitations & privacy
Valid for heights between 140 cm and 230 cm. The Devine formula was designed as a clinical dosing reference, not a fitness or beauty target, and does not account for muscle mass, bone density, or body frame. It is not medical advice.
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A few good questions
Is this the same as a healthy BMI range?
No. This uses the height-based Devine formula, while the BMI calculator uses weight divided by height squared. The two methods can give different reference numbers.
Why does the formula differ by sex?
The Devine formula uses separate baseline constants for men and women, reflecting average differences in body composition observed in the original clinical population it was derived from.
Should I use this number as a personal goal?
Treat it as a general reference point only. A qualified healthcare professional can account for your frame, muscle mass, and health history far better than a single formula.
Updated September 19, 2026