How ideal weight calculator works
Ideal body weight (IBW) is an estimate of the weight associated with the lowest health risk for a given height. Several formulas were developed from insurance and population data in the 20th century. None is perfect, but together they give a useful target range rather than a single number.
This calculator reports four classic formulas. Each starts with a base weight at 5 feet tall (152 cm) and adds a fixed number of kilograms for every inch over 5 feet, with different bases and increments for men and women. Devine (the most cited) uses 50 kg plus 2.3 kg per inch for men; Robinson, Hamwi, and Miller use slightly different constants.
Enter your gender and height in centimetres. The calculator converts to inches, applies each formula, and lists all four results so you can see the spread. Treat the range as a rough guide — healthy weight depends on muscle mass, frame size, and body composition, not height and gender alone. Consult a healthcare professional for personal advice.