Ideal Weight Calculator
Enter your sex and height to get your ideal weight from several medical formulas, plus the healthy weight range based on BMI. Works in metric or imperial units.
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What is ideal weight?
"Ideal weight" is a reference concept: it usually means the weight range or target associated with lower health risk for a given height. Different medical formulas give slightly different answers.
This tool combines two views: the healthy weight range based on BMI (18.5–24.9), and the ideal weights from four classic formulas — Devine, Robinson, Miller and Hamwi.
Healthy weight range from BMI
For most adults, the weight range that maps to a BMI between 18.5 and 24.9 is considered the healthy range.
18.5 – 24.9Ideal weight formulas
These formulas start from a base weight at 5 feet (about 152 cm) and add an increment per inch above it:
| Formula | Calculation |
|---|---|
| Devine | Men 50 + 2.3 kg/in, women 45.5 + 2.3 kg/in |
| Robinson | Men 52 + 1.9 kg/in, women 49 + 1.7 kg/in |
| Miller | Men 56.2 + 1.41 kg/in, women 53.1 + 1.36 kg/in |
| Hamwi | Men 48 + 2.7 kg/in, women 45.5 + 2.2 kg/in |
Keep in mind
Ideal weight is a statistical reference, not a diagnosis. Interpret with care for:
- Athletes and very muscular people — ideal weight can underestimate their healthy weight
- Pregnancy and breastfeeding
- Children and teenagers — use age-based growth charts instead
- Different ethnicities — the same weight can carry different health risks
Frequently asked questions
What is ideal weight?
Ideal weight is a reference weight for your height associated with lower health risk. It is usually based on statistical formulas or BMI ranges, used to roughly judge whether your weight is in a sensible range.
Why do different formulas give different results?
Each formula was built on a different population and era, with different assumptions for base weight and per-inch increment for men and women — so results differ by a few kilograms. Reading several formulas as a range is more useful than any single number.
How is ideal weight different from a healthy weight range?
The healthy weight range comes from BMI 18.5–24.9 and gives a span. Ideal weight formulas give a single target. The former is for screening; the latter is more like a rough target reference.
Which number should I use?
Treat the BMI healthy range as your primary reference and the formula results as a target range. Your actual goal should also consider body fat, muscle mass and a doctor’s advice.
Is ideal weight accurate for everyone?
Not entirely. It can be less accurate for athletes, pregnant people, children and others, because the formulas were designed for the general adult population.
Does this calculator store my data?
No. All calculations run locally in your browser and nothing is uploaded or saved.