Ideal Weight Calculator

Ideal Weight Calculator shows four published formulas side by side precisely because they disagree. Devine, Robinson, Miller and Hamwi all take height and sex and return a single number, and for the same person those numbers differ by several kilograms.

That disagreement is the most informative thing about them. All four were devised between 1964 and 1983, mostly for clinical purposes such as calculating drug doses where a standardised body weight is needed, not as health targets for individuals. None of them accounts for build, muscle mass, age or anything else about a particular person.

The healthy BMI range is shown alongside and is the more useful figure. For a given height it spans roughly twenty kilograms, which is a realistic reflection of how much healthy weight actually varies between people. A range you fall inside is a better answer than a single number you are a few kilograms away from.

This is general information and not medical advice. The formula cannot know your medical history, your medication, your body composition or anything else specific to you. Speak to a doctor or another qualified professional about any question concerning your health, and never delay seeking advice because of a figure on this page.

Your measurements are processed inside your own browser. Height, weight, age and anything else you enter never leave your device, nothing is logged, and nothing survives closing the tab.

• Shows healthy bmi range, devine formula, average of the four, your current bmi and difference from the average together, so you are not running it twice
• A results table you can read across
• Updates as you type, with no button to press and no page reload
• Copy the result in one click
• Free, no sign-up, and it runs entirely in your browser

The ideal weight calculator is used by writers, developers, students, marketers and anyone else who needs the job done once without installing software. Common cases include:

• Seeing the healthy weight range for a height
• Comparing the formulas rather than trusting one
• Checking a clinical ideal body weight figure
• Putting a current weight in context