How it works
What this calculadora actually does
This Ideal Weight Calculator turns a quick question into a straight answer: punch in the numbers, read the ideal weight calculator, move on with the day.
Ideal Weight Calculator is built to give you a clean, explainable answer without the usual wall of ads — type the numbers, read the result, keep moving.
These numbers are guidance, not a prescription — your plate still matters more than the tracker. Think of an average week rather than today — then work out the numbers and the rest of this page explains what the answer means.
Devine (1974), Robinson (1983), Miller (1983) and Hamwi (1964) formulas all return slightly different "ideal" weights based on height. None is a definitive target — use them as a healthy weight window alongside BMI.
On this page you will see Nutrition & Fitness, NHS and WHO treated as first-class terms — each one is linked to the calculators and references that use it, so you can follow the thread without retyping queries into a search bar.
If it helps, jump straight to the Nutrition hub or compare with the BMI Calculator and the BMR Calculator — those two calcs are the ones readers usually open right after this page.
A sample run with everything shown
The quickest way to sanity-check any formula is to try it on figures you recognise. Try these:
Devine (1974), Robinson (1983), Miller (1983) and Hamwi (1964) formulas all return slightly different "ideal" weights based on height. None is a definitive target — use them as a healthy weight window alongside BMI.
Moments this tool earns its keep
Ideal Weight Calculator is aimed at people arriving with questions like these:
- "Devine formula"
- "Ideal weight for height"
- "What is a healthy weight"
- "What is ideal weight calculator"
- "How to calculate ideal weight calculator"
- "Ideal weight calculator formula"
Where the number stops being useful
Every tool has an edge where it stops being the right answer. Ideal Weight Calculator is no exception:
- For legally binding tax or medical decisions — cross-check with HMRC, NHS or a qualified professional.
- For very large or very small extremes the rounding error outgrows the useful precision.
- When the underlying rate or threshold has changed since the page was last reviewed — always verify with the primary source.
- When the input you have is already a derived figure (net of something) — feeding it in as "gross" will double-subtract.
Mistakes we see over and over
Every time you work out the numbers for a new scenario, one of these creeps in — it's worth knowing them ahead of time.
- Misreading the unit in the label — 'per year', 'per month' and 'per day' versions of the same figure differ by 12× or 365×.
- Taking a ratio and multiplying it by the wrong side of the inputs — always write the ratio as A/B with labels before running.
- Trusting a screenshot of someone else’s calculation — rerun it yourself with the same inputs, numbers drift.
- Assuming percentages add up. 10% off then 10% more is not the original price — it is 99% of it.
- Not refreshing the page when thresholds are date-sensitive. If the page was cached yesterday, bank rates may already be yesterday’s.
The sources behind the numbers
Where the maths needs an external authority, we cross-check against:
- NHS
- WHO
Works well alongside
If this question keeps coming up for you, the same cluster of tools usually comes next:
- BMI Calculator — Check your Body Mass Index in metric or imperial, with NHS weight categories explained.
- BMR Calculator — Estimate your Basal Metabolic Rate — the calories your body burns at rest — with the Mifflin-St Jeor equation.
How we keep this accurate
Our calculadoras run on pure, unit-tested functions — the same logic lives in the browser and in the CI test suite. When tax rates, thresholds or official figures move, the update lands within 24 hours of the announcement. You can read the editorial policy and corrections policy.
Found an out-of-date number on Ideal Weight Calculator or anywhere else in the Nutrition toolkit? Send it to the editorial desk and we'll patch it. Or browse the full calculadora directory for the next tool you need.