Ideal Weight Calculator
Estimate your ideal bodyweight using four classic clinical formulas — Devine, Robinson, Miller, and Hamwi — based on your height and sex.
- Free to use
- Accurate results
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- Works on all devices
Your result
65.9 kg
Average of all four formulas
AI explanation
Formula
Each formula: base constant + slope × (height in inches − 60), with sex-specific constantsWorked example
Male, 175cm
| Field | Value |
|---|---|
| Height | 175 |
| Sex | male |
| Devine formula | 70.5 |
| Average of all four formulas | 70 |
Assumptions
- These four formulas (Devine 1974, Robinson 1983, Miller 1983, Hamwi 1964) were originally developed for medication dosing, not fitness or aesthetic goals — they can diverge noticeably from a person's healthy weight range, especially for very tall, short, or muscular individuals.
- Informational only — not personalized medical advice. See also the Healthy Weight Calculator for a BMI-range-based alternative.
Frequently asked questions
Which ideal weight formula is most accurate?
None of the four is definitively "most accurate" — they were all developed decades ago for drug-dosing calculations, not as fitness targets, and they can disagree by several kilograms for the same height. The average across all four gives a reasonable single reference point.
Why do these formulas give a lower number than my healthy BMI range?
These formulas were calibrated on clinical population data from the mid-20th century and don't account for muscle mass or modern population body composition — the BMI-based Healthy Weight Calculator is often a more practical everyday reference.
Do these formulas work for children?
No — they were derived from adult clinical data and are not valid for children or adolescents who are still growing.
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Sources
- Gentamicin therapy (origin of the Devine formula for ideal body weight) — Drug Intelligence & Clinical Pharmacy. Effective 01-01-1974, reviewed 13-09-2026.
This calculator provides a general estimate only and does not constitute personalized medical advice. Consult a qualified healthcare professional for guidance on a healthy weight for you.
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