Ideal body weight (IBW) formulas were developed to dose medicines and are a rough guide only. This calculator shows Devine, Robinson, Miller and Hamwi estimates alongside the healthy weight range for a BMI of 18.5–24.9 at your height.
What does this tool do?
Estimates your healthy weight range from height (and frame inputs) using standard medical formulas — Devine, Robinson and Miller — shown side by side with the BMI-based range. One height, several expert estimates.
Because the math runs locally, the Ideal Weight Calculator works offline after the page loads and never queues behind a server — handy during load-shedding or on slow mobile data. There is nothing to install and no account to create; the page is the whole application, ready in the time it takes to open a tab.
Using it is simple: the inputs are “Height (cm)”, “Height (ft)” and “Inches”. Results update live as you work — there is no waiting and nothing to submit.
How do I use this tool?
Enter your figures below — every result updates the instant you type, so comparing scenarios is just a matter of changing a number and watching the answer move.
- Enter your values in “Height (cm)”, “Height (ft)”, “Inches”.
- Results update instantly as you type — no button to press.
How does it work?
Devine: men 50 + 2.3×(inches over 5ft); women 45.5 + 2.3×… Robinson/Miller use slightly different bases. The BMI range (18.5–24.9 × h²) is shown alongside since it is the most widely used reference.
The formula used is the standard one taught and published for this calculation — the tool does not invent methods. Where conventions differ (rounding, day-count, tax treatment), the page follows the common Pakistani practice and says so, so the result matches what local institutions expect.
Use cases in Pakistan
Doctors quote ideal weight during check-ups; army/police recruitment and airline medicals screen against height–weight charts; and gym trainers set target weights from these formulas. Useful as a goalpost — not a verdict on health.
Families use it for household budgeting and school-fee planning; small businesses for pricing and payroll math; students for everything from BISE numericals to CSS preparation. Wherever the same calculation is repeated monthly — bills, salaries, savings targets — this page replaces the phone-calculator ritual.
Limitations
Formulas were derived from specific populations and ignore muscle, bone density and body composition — athletes overshoot them healthily. They are screening guides; a clinician interprets them for individuals, especially children and the elderly.
Assumptions are stated on the page — read them before trusting the headline number for money, health or legal decisions. A calculator amplifies the quality of its inputs: careful numbers in, trustworthy numbers out.
Frequently asked questions
Which formula is right?
None is “true” — they are different expert estimates. The tool shows several so you see the range, not a false single number. For figures that go into applications or documents, double-check the inputs against the source — the math is exact, but only for the numbers you enter.
Why do formulas disagree?
They were fitted to different populations and eras. Treat the spread as the honest answer. Try varying one input at a time to see which assumption drives the result; that sensitivity check is often more valuable than the headline number.
I am muscular — does it apply?
Less so. These formulas assume average composition; muscular people healthily exceed them. Save or screenshot the result with its inputs when the figure matters later — reconstructing “what did I enter?” is harder than it sounds.
Is ideal weight the same as healthy weight?
Roughly — but health also involves fitness, diet, sleep and body composition, not just the scale. For figures that go into applications or documents, double-check the inputs against the source — the math is exact, but only for the numbers you enter.
Is my data uploaded or stored?
No. This tool runs entirely in your browser — what you type or paste never leaves your device, is never sent to a server, and is never stored. Closing the tab removes all trace. Try varying one input at a time to see which assumption drives the result; that sensitivity check is often more valuable than the headline number.
Is it really free? Do I need an account?
Yes, free, and no account needed. Open the page and use it — no sign-up, no trial, no watermark on results. Save or screenshot the result with its inputs when the figure matters later — reconstructing “what did I enter?” is harder than it sounds.
Updated October 2026 · Built and tested by Sharjeel Tahir · How our tools are tested