Find your ideal weight with four validated formulas — Hamwi, Devine, Miller, and Robinson. This ideal weight calculator shows a healthy BMI weight range for men and women, plus a personalized weight goal based on your height.
Hamwi, Devine, Miller & Robinson formulas
No single ideal weight formula is perfect for everyone — each was developed for different clinical populations at different points in history. The Devine formula (1974) is the most widely used in US hospital settings for calculating drug dosages based on body weight. The Hamwi formula is a staple of clinical nutrition programs. The Robinson and Miller formulas tend to produce slightly lower estimates that better reflect lighter body frames. Using the average of all four gives you a reliable healthy weight range rather than a single rigid number — a much more practical weight goal for most adults.
It's important to understand that ideal weight calculators estimate a healthy BMI weight range (typically BMI 18.5–24.9) based on height and gender alone. They don't account for muscle mass, bone density, age, or ethnicity — all of which affect what a healthy weight looks like for a specific individual. A 5'10" male athlete with significant muscle mass may weigh 195 lbs with only 12% body fat, well above the Hamwi estimate of 166 lbs, yet be in excellent health. Use this calculator as a starting benchmark, not a rigid target — and pair it with a BMI check, body fat percentage measurement, and guidance from a healthcare provider for a complete picture.
The standard in US hospital pharmacology for weight-based drug dosing. Male: 50 kg + 2.3 kg per inch over 5 ft. Female: 45.5 kg + 2.3 kg per inch over 5 ft. Tends to produce moderate estimates for most heights.
The most widely taught clinical nutrition formula in the US. Male: 106 lbs + 6 lbs per inch over 5 ft. Female: 100 lbs + 5 lbs per inch over 5 ft. Simple and easy to apply without a calculator — used in hospitals and nutrition counseling daily.
Produces slightly lower ideal weight estimates than Devine. Sometimes recommended for Asian populations where WHO BMI classifications suggest lower healthy weight thresholds. Useful if you have a smaller frame or lower bone density.
Male: 52 kg + 1.9 kg per inch over 5 ft. Female: 49 kg + 1.7 kg per inch over 5 ft. Falls between Hamwi and Miller in most cases, offering a moderate healthy weight estimate for average frame sizes.
There is no single ideal weight formula, and the honest presentation is to show several. All four in common use share a structure — a base weight at five feet, plus a fixed increment per inch above it — and they disagree by several kilograms because each was fitted for a different purpose. Devine (1974) was devised for calculating drug dosages, not aesthetics, and remains the clinical default for that reason. Robinson and Miller refined it against later population data. Hamwi, the oldest, runs highest. None account for frame size, muscle mass or age, so the sensible reading is the range they span rather than any one figure.
Devine (men): 50.0 kg + 2.3 kg per inch over 5 ftRobinson (men): 52.0 kg + 1.9 kg per inch over 5 ftMiller (men): 56.2 kg + 1.41 kg per inch over 5 ftHamwi (men): 48.0 kg + 2.7 kg per inch over 5 ftwhere:
Assumptions: Population averages with no allowance for frame size, body composition or age. A healthy BMI range for your height is a more defensible target than any single "ideal" number.
70 inches is 10 inches above the five-foot base used by every one of these equations.
Result70.3–75.0 kg depending on formula — BMI-healthy range is 58.6–78.9 kg
The BMI range is far wider than the formulas suggest, which is the useful lesson: "ideal" weight is a band, not a point. Where you sit sensibly within it depends on muscle mass and frame, neither of which any of these equations can measure.