Ideal Weight Calculator
Find your ideal body weight based on height, gender, and frame size using four clinically validated formulas.
Your Results
| Formula | Ideal Weight | BMI |
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How It Works
Four clinically validated formulas give a comprehensive picture of your ideal weight.
Devine Formula
The most widely used formula in clinical settings. Devine: Male: 50kg + 2.3kg per inch over 5ft. Female: 45.5kg + 2.3kg per inch over 5ft.
Robinson Formula
Slightly more conservative than Devine. Robinson: Male: 52kg + 1.9kg per inch over 5ft. Female: 49kg + 1.7kg per inch over 5ft.
Miller & Hamwi
Miller tends to give lower values for shorter individuals. Hamwi generally gives higher values. Averaging all four provides the most reliable estimate.
Frequently Asked Questions
Common questions about ideal body weight calculation.
Ideal body weight (IBW) is an estimate of a healthy weight range based on height and gender. It was originally developed for medical dosing but is now commonly used as a general health benchmark. Multiple formulas exist with slightly different results.
The Devine formula is the most widely referenced in clinical settings, but the Miller formula may be more accurate for taller individuals. The Hamwi formula tends to give slightly higher values while Robinson gives slightly lower ones. We recommend using the average across all four formulas.
Measure your wrist circumference just below the wrist bone. For men: small < 6.5 in (16.5 cm), medium 6.5-7.5 in (16.5-19 cm), large > 7.5 in (19 cm). For women: small < 5.5 in (14 cm), medium 5.5-6.5 in (14-16.5 cm), large > 6.5 in (16.5 cm). Alternatively, use elbow breadth.
Ideal weight is a reference point, not necessarily a target. A healthy weight range (BMI 18.5-24.9) gives more flexibility. Muscle mass, bone density, and body composition mean your healthy weight may differ from the calculated ideal.
These formulas are designed for adults aged 18 and over. For children and teenagers, growth charts and BMI percentiles are more appropriate. Consult a pediatrician for age-appropriate weight assessment.