Find your ideal body weight using five established medical formulas — Devine, Robinson, Miller, Hamwi, and healthy BMI range.
Your Measurements
Enter your height and sex
kg
Ideal Weight Range
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Across all 4 major formulas
Your Diff
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Devine
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Robinson
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Miller
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Hamwi
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Devine Formula
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Robinson Formula
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Miller Formula
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Hamwi Formula
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Healthy BMI Range (18.5–24.9)
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Average of all formulas
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Enter your height and sex
Get your ideal weight range from 5 medical formulas including BMI-based healthy range.
Ideal Weight Formulas
Formula
Men (base 5ft)
Women (base 5ft)
Devine
50 + 2.3/in
45.5 + 2.3/in
Robinson
52 + 1.9/in
49 + 1.7/in
Miller
56.2 + 1.41/in
53.1 + 1.36/in
Hamwi
48 + 2.7/in
45.4 + 2.25/in
Frequently Asked Questions
Which formula is most accurate?
No single formula is best for everyone. The Devine formula is widely used in clinical settings. For most people, the average of all four formulas provides a good reference range. Always consider body composition alongside these estimates.
Why do formulas give different results?
Each formula was developed from different population studies and time periods. They differ in their baseline weight and per-inch adjustment, resulting in a 2–5 kg spread between them.
Is ideal weight the same as healthy weight?
Not necessarily. The BMI-based range (18.5–24.9) gives a weight range based on body composition risk, while formula-based ideal weight targets a single number. Both are useful guides but do not replace a healthcare professional assessment.