Ideal Weight Calculator
Calculate your ideal body weight based on gender, height, and age using multiple formulas (Devine, Robinson, Miller, Hamwi). Get a range and understand your healthy weight zone.
Published by:
isCalculator Editorial Team
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How to use this tool?
How to Use the Ideal Weight Calculator
- Select your gender – Choose Male or Female from the dropdown.
- Enter your height – Type your height in centimeters (e.g., 170). Must be between 50 and 250 cm.
- Enter your age – Provide your age in years (1–120).
- Choose your frame size – Select Small, Medium (default), or Large.
- Click "Calculate Ideal Weight" – The result shows a weight range (in kg) based on four formulas: Devine, Robinson, Miller, and Hamwi, adjusted for frame size.
- Review the output – The range (min–max) and average ideal weight are displayed, along with individual formula values.
Note: All inputs are metric (cm for height, kg for weight). Ensure valid numbers to avoid errors.
Previous Results
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Frequently Asked Questions
Ideal body weight is an estimate of a healthy weight range based on height, gender, and sometimes frame size. It is used as a screening tool and not a definitive measure of health.
Different formulas may suit different populations. The Devine formula is commonly used for medication dosing, while the Hamwi formula is simpler. Our calculator shows results from four formulas to give you a range.
Frame size adjusts the calculated weight: small frame reduces by 10%, large frame increases by 10%. This accounts for differences in bone density and body composition.
