Ideal Weight Calculator

How Ideal Weight Calculator works

Estimate ideal body weight with the Devine and Robinson formulas. Both formulas start from 60 inches of height and add weight per additional inch, adjusted for sex. Everything happens inside this page: the tool reads your input, runs the calculation or conversion locally, and hands the result back to you. Nothing is transmitted, because there is no backend to transmit it to.

That design choice is deliberate. Most free tool sites upload your files to a server, process them there, and quietly keep a copy. Toolcin cannot do that — the site is a set of static files. If your connection dropped the moment the page finished loading, every tool would still work.

Two formulas, two answers

Devine and Robinson both start from 60 inches of height and add weight per additional inch, adjusted for sex. For a 175 cm man, Devine gives about 70 kg and Robinson about 68 kg.

The difference is not an error — they were derived from different populations in different decades, and neither is a target for an individual.

Why the concept is contested

“Ideal weight” comes from insurance tables of the mid-20th century, built on mortality data from specific populations. It ignores body composition, and a formula keyed to height alone cannot describe a healthy weight for a muscular or a frail person.

A better use

Treat the output as one data point alongside BMI, waist circumference and how you actually function. A range is more honest than a single number, and a clinician is the one who can interpret it.

Good to know

• Works offline once loaded, including on flights and in locked-down networks.
• No file size limit beyond your device's own memory.
• Free to use, with no account and no usage counter.
• Results are produced locally, so they are not logged or shared with anyone.

Questions

How this number is produced

The calculation is the Devine and Robinson height-based formulas, which start from 60 inches, following Devine (1974), Robinson (1983). The formula is repeated here so the result can be checked by hand rather than taken on trust.

This is a calculator, not advice. No clinician, accountant or adviser has reviewed it, and it cannot see your circumstances. For anything involving health, a loan, a tax filing or a religious obligation, confirm the figure with a qualified professional or the authority that publishes the rule.