Ideal Weight Calculator
Enter your sex and height to see your estimated ideal body weight from four widely used medical formulas, along with their average.
Your calculation is performed in your browser.This result is an estimate for informational and educational purposes. It isn’t a diagnosis and isn’t a substitute for advice from a doctor, registered dietitian, or other qualified professional. See our methodology and sources for the formula used and its limitations.
How it works
The calculator applies four separate ideal-body-weight formulas developed for clinical and dosing use, each starting from a base weight for 5 feet of height and adding a fixed amount per inch above that, with different constants for men and women.
Formula & methodology
Four well-known formulas are calculated and then averaged. Each starts from a base weight for someone 5 feet (60 inches) tall and adds a fixed amount for every inch above that. Heights under 5 feet use zero extra inches. Results are in kilograms and are estimates, not targets.
H = height (in) − 60 (minimum 0)Ideal weight = (Devine + Robinson + Miller + Hamwi) ÷ 4What each term means
- Extra inches (H)
- Inches of height above 5 feet.
Formulas (result in kg)
| Formula | Men | Women |
|---|---|---|
| Devine (1974) | 50 + 2.3 × H | 45.5 + 2.3 × H |
| Robinson (1983) | 52 + 1.9 × H | 49 + 1.7 × H |
| Miller (1983) | 56.2 + 1.41 × H | 53.1 + 1.36 × H |
| Hamwi (1964) | 48.0 + 2.7 × H | 45.5 + 2.2 × H |
Worked example
A man who is 180 cm tall (about 5'11") gets an ideal weight estimate of roughly 71–77 kg depending on the formula used, averaging around 74 kg.
Common uses
- —Getting a clinical-style reference weight for your height, similar to how some medical dosing calculations work.
- —Comparing multiple established formulas rather than relying on a single estimate.
- —Setting a long-term reference point alongside the Healthy Weight and BMI calculators.
Important notes
- —These formulas were originally developed to estimate drug dosing weight, not necessarily an optimal aesthetic or health target.
- —Results can vary noticeably by formula, especially at greater heights — the average is a reasonable single reference point.