Free ideal weight calculator: find your healthy body weight range from height and gender with the Devine, Robinson and Miller formulas.
Ideal body weight (IBW) is an estimate of a healthy weight range for your height. This calculator uses three common formulas (Devine, Robinson, Miller) to give you a range rather than a single number. Note that ideal weight does not account for muscle mass or body composition.
None is universally best. Devine is the most widely used clinically, Robinson and Miller give slightly different values. Averaging them into a range, as this calculator does, is more useful than a single number.
No. These are height-based estimates only. A muscular person can be above the range while having low body fat, and that is healthy. Use body composition measures as well.
Not exactly. Healthy weight is usually expressed as a BMI range (18.5-24.9); ideal weight formulas produce narrower, height-only estimates. The two usually overlap.
They were developed in the United States with imperial units. Converting height to inches keeps the coefficients standard; the result is the same in kilograms.
Yes. Each formula has separate intercepts for men and women because average body composition and frame size differ. The female formulas start from a lower base weight.
Ideal weight is a reference, not a verdict. If your BMI and body fat are in healthy ranges and you feel well, small differences from the formula matter little. Focus on sustainable habits rather than a specific number.