Ideal Weight Calculator
Compare Devine, Robinson, Miller, and Hamwi ideal-weight estimates with an adult BMI reference range in your browser.
Your result
Adult reference estimate
Average of four formulas
Formula range: 71.5–77.3 kg
How to read this: These historical formula estimates do not represent a single ideal or healthy weight.
Formula results and BMI reference range
BMI 18.5–24.9 corresponds to: 59.9–80.7 kg
| Method | Calculation basis | Reference weight | Notes |
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How to read this result
Why are there several values?
Devine, Robinson, Miller, and Hamwi are experience-based formulas proposed at different times. Their average and range can be a starting point for discussion, not a number you must reach.
Limits of use
Do not directly extrapolate these formulas below 152.4 cm (5 feet).These formulas generally use height above 5 feet as their calculation basis. They are also not intended for pregnancy, children, or adolescents.
Learn more
Formulas, units, and example
First convert height to inches, then calculate inches above 5 feet, n: n = height (cm) ÷ 2.54 − 60.
- Devine: male 50 + 2.3n; female 45.5 + 2.3n
- Robinson: male 52 + 1.9n; female 49 + 1.7n
- Miller: male 56.2 + 1.41n; female 53.1 + 1.36n
- Hamwi: male 48 + 2.7n; female 45.5 + 2.2n
Example: male, 180 cm, n ≈ 10.87; Devine ≈ 75.0 kg. Values display to one decimal place while calculations use full floating-point precision.
Does “ideal weight” equal a health goal?
No. Weight and health are also affected by age, body-fat distribution, muscle mass, medical conditions, medicines, lifestyle, and personal history. BMI is an adult screening reference, not a diagnosis.
What can you do next?
Use the BMI reference range alongside weight trends, waist measurement, and advice from a clinician or registered dietitian. Seek professional advice for pregnancy, people under 18, or unintentional major weight change.
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Privacy and source
This tool does not upload data, require an account, or use a backend service. It is for general health information only and is not medical advice, diagnosis, or treatment.
Formula reference: Calmly Health: Ideal Weight Calculator (used to cross-check the formulas); healthy-weight background: World Health Organization: Obesity and overweight. Page updated: .
Implementation: native HTML, CSS, and JavaScript with local calculation; no third-party code or calculation libraries are used.