Ideal Weight Calculator
Find your ideal body weight range using four established medical formulas — showing the individual results, average and typical range in both kg and lbs.
What Does This Tool Do?
Calculate ideal body weight using four established medical formulas (Hamwi, Devine, Robinson, Miller), showing results in both kg and lbs with the average and typical range.
Key Features
4 Formulas
Hamwi, Devine, Robinson and Miller.
Average & Range
Average of all formulas plus ±5 kg range.
kg & lbs
Results in both metric and imperial.
Instant
Immediate results.
How to Use
- Enter your height in centimetres.
- Select your sex.
- Click Calculate Ideal Weight.
Frequently Asked Questions
Which formula is most accurate?▾
No single formula is universally most accurate — each was developed for different clinical purposes. The Devine formula is most common in clinical settings; the average gives a reasonable range.
Is ideal weight the same as healthy BMI weight?▾
Not exactly. Ideal weight formulas predate the BMI concept. A BMI of 18.5–24.9 is generally considered the healthy range.
What are the formulas?▾
Hamwi (M): 48+2.7(H-60in). Devine (M): 50+2.3(H-60in). Robinson (M): 52+1.9(H-60in). Miller (M): 56.2+1.41(H-60in). Females use slightly different constants.