Health
Ideal Weight Calculator
See what multiple formulas say about a healthy weight range for your height. Compare BMI-based and devine-based estimates.
Guide
How to use the Ideal Weight Calculator
The Ideal Weight Calculator helps you make a quick estimate, compare scenarios, and understand the numbers behind the result. It is designed for fast planning, with enough context to make the answer useful instead of just a number.
- Enter current measurements as accurately as possible, using the unit system that fits you best.
- Compare the result with the displayed ranges or targets to understand the estimate in context.
- Adjust assumptions such as activity level, sex, age, or goal where the calculator supports them.
Method
How this calculator works
It compares several common ideal-weight formulas and presents the results as a range.
This calculator is useful for getting a broad weight reference point rather than a single exact target.
Because assumptions matter, try a few values that represent optimistic, typical, and conservative cases.
Health calculators are screening and planning tools, not medical advice. They cannot replace a clinician's evaluation.
Example
Worked example
For a 5'9" (175 cm) man, the formulas land between roughly 69 and 72 kg (152–159 lb): Devine 70.7, Robinson 69.1, Miller 68.9, Hamwi 72.3. The BMI healthy range for that height is much wider — about 57 to 76 kg (125–168 lb) — which puts the formula cluster comfortably in its middle.
FAQ
Common questions
Which ideal weight formula is the most accurate?
None is definitive — Devine, Robinson, Miller, and Hamwi were all developed for clinical purposes (Devine originally for drug dosing) and differ by several kilograms for the same height. That is why this calculator shows them side by side as a range rather than picking one.
Why do the formulas disagree with the BMI range?
The classic formulas return a single point estimate per height and sex, while the BMI-based range spans everything from 18.5 to 24.9. A healthy weight is genuinely a range — body composition, frame size, and age all shift where in it an individual lands.
What information do I need for the Ideal Weight?
You usually need height, sex, and unit preference. You can change the inputs and recalculate as many times as needed.
How does the Ideal Weight calculate the result?
It compares several common ideal-weight formulas and presents the results as a range.
Are the results exact?
Health calculators are screening and planning tools, not medical advice. They cannot replace a clinician's evaluation.
Related
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Sources