Ideal Weight Calculator — Free Online Tool

The Ideal Weight Calculator gives a healthy weight range for your height using established formulas such as Devine, Robinson, Miller, and Hamwi, alongside a BMI-derived range.

Different formulas give different answers, and showing several makes that visible rather than hiding it behind false precision. They were developed for different purposes — some originated in clinical drug-dosing contexts rather than as health targets — and none was designed to tell an individual what they should weigh. A range across methods is a more honest output than a single number.

The limitation shared by all of them, and by BMI, is that they use only height and weight. They cannot distinguish muscle from fat, which is why a well-trained athlete routinely classifies as overweight while carrying very little body fat, and why someone at a "normal" weight can carry a high fat percentage with low muscle mass. They also do not account for frame size, age-related changes in body composition, or the documented variation in healthy body composition between populations — the thresholds were largely derived from European-descent populations and fit others less well.

What correlates better with health outcomes than weight alone: waist circumference, waist-to-height ratio, cardiovascular fitness, strength, and blood markers. Someone improving on all of those while the scale stays flat is getting healthier, whatever a formula says.

This is general information, not medical advice. For a genuine assessment, a doctor can consider factors no formula can.

Calculation runs in your browser.

Our Ideal Weight Calculator is completely free to use with no signup required. For this tool, processing runs in your browser — your files and data stay on your device and are not uploaded to our servers.

Whether you are a developer, designer, student, or business owner, this tool is designed to save you time and make your workflow more efficient. Bookmark this page to access it whenever you need it — it will always be free.