Your Height & Profile
Your Ideal Weight Range
Based on 4 clinical formulas
BMI-Based Healthy Range (18.5-24.9)
Enter your height and profile to see personalized results from 4 clinical formulas.
All Formulas Side by Side
See how each formula calculates your ideal weight and where they agree.
Why "Ideal Weight" Is a Range, Not a Number
Understanding the limitations and strengths of weight estimation formulas.
Clinical Origins
These formulas were originally developed for medication dosing, not fitness goals. Hamwi (1964), Devine (1974), Robinson (1983), and Miller (1983) each used different populations and assumptions, which is why they produce different results.
Body Composition Matters More
A muscular person may weigh more than their "ideal" according to these formulas yet be perfectly healthy. Body fat percentage, waist-to-hip ratio, and overall fitness are better health indicators than weight alone.
Use the Range, Not a Single Number
The spread across these formulas shows the natural variation in "healthy weight." If all four formulas give you 140-160 lbs, the healthy range for your height is approximately 140-160 lbs. Focus on how you feel and perform, not hitting one exact number.
Frame Size Adjustment
Bone structure varies significantly between individuals. Someone with a large frame naturally carries more weight in bone and muscle. The frame size adjustment in Hamwi's formula accounts for this -- small frames reduce the estimate by 10%, large frames increase it by 10%.
Understanding Ideal Weight Formulas
No single "ideal weight" formula is universally accurate, because body weight depends on frame size, muscle mass, age, ethnicity, and many other factors. These formulas provide guidelines that were originally developed for clinical drug dosing, where body weight affects medication calculations.
Hamwi Formula (1964)
The most widely used clinical formula. Male: 48 kg + 2.7 kg per inch over 5 feet. Female: 45.5 kg + 2.2 kg per inch over 5 feet. Adjusted by frame size (plus or minus 10%).
Devine Formula (1974)
Developed by Dr. B.J. Devine for pharmaceutical dosing. Male: 50 kg + 2.3 kg per inch over 5 feet. Female: 45.5 kg + 2.3 kg per inch over 5 feet. The most commonly referenced in medical literature.
Robinson Formula (1983)
A refinement of the Devine formula by Dr. J.D. Robinson. Male: 52 kg + 1.9 kg per inch over 5 feet. Female: 49 kg + 1.7 kg per inch over 5 feet. Produces slightly lower estimates for taller individuals.
Miller Formula (1983)
Developed by Dr. D.R. Miller. Male: 56.2 kg + 1.41 kg per inch over 5 feet. Female: 53.1 kg + 1.36 kg per inch over 5 feet. Generally produces the lowest estimates for tall individuals, making it useful for smaller-framed people.
BMI-Based Range
The World Health Organization defines a healthy BMI as 18.5 to 24.9. This translates to a weight range for any given height and provides the widest "healthy" window. It is the most inclusive estimate but does not account for muscle mass or frame size.
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