Ideal weight formulas estimate a healthy weight range from your height and sex, using classic equations such as Devine, Robinson or Hamwi. They give a rough target range, not a personal prescription, and do not account for muscle or frame. A free ideal weight calculator applies these formulas in your browser.
Free ideal weight calculator. Estimate a healthy target weight from your height and sex using the Devine, Robinson and Hamwi formulas plus a BMI range.
Open Ideal Weight Calculator → Free toolFree BMI calculator. Calculate your Body Mass Index in metric or imperial units and see your weight category instantly. Private, no sign-up.
Open BMI Calculator →The common ideal weight formulas (Devine, Robinson, Miller and Hamwi) all start from a base weight at 5 feet of height and add a set amount per additional inch, with different constants for men and women. Because they depend only on height and sex, they produce a range rather than one exact number, and different formulas give slightly different targets, which is why a calculator often shows several side by side.
These formulas ignore body composition, frame size and muscle, so an athletic build can sit above the estimated ideal while being perfectly healthy. Treat the output as a rough reference alongside other measures like body fat and BMI, and rely on a healthcare professional for a real target. The tool is a screening estimate, not medical advice.
It applies classic height-based equations such as Devine, Robinson, Miller and Hamwi, which is why it shows a range rather than one number.
No. These formulas use only height and sex, so muscular or large-framed people can healthily weigh more than the estimate.
No. Different formulas give slightly different targets, and healthy weight varies by person. Use the range as a rough guide and consult a professional.