Introducing the Ideal Weight Calculator — Four Formulas at Once

There’s no single “correct” ideal weight, so the new Ideal Weight Calculator doesn’t pretend there is. It shows four respected clinical formulas at once, plus the healthy BMI range for your height — giving you a sensible band instead of one misleading number.

What it does

• Four formulas — Devine, Robinson, Miller, and Hamwi, side by side.
• An average for a single, easy-to-read figure.
• Healthy BMI range (18.5–24.9) for your exact height.
• Metric or imperial height input, results in kg and lb.
• Fully client-side — nothing you enter is uploaded.

Why four formulas?

Each formula was derived for a slightly different purpose, so they disagree by a few kilograms. That spread is honest: it reflects how fuzzy the whole idea of “ideal weight” really is. Seeing them together — and inside the BMI band — is far more useful than trusting a single figure.

Informational only

These formulas know only your height and sex; they can’t see muscle, frame, or body composition. The result is a starting point for a conversation, not a medical target. Always talk to a doctor or registered dietitian before making significant changes.

Learn more

Curious where these formulas come from and why they differ? Our guide to ideal body weight formulas breaks down each one, then try your own numbers in the Ideal Weight Calculator.