Ideal Weight Calculator
This calculator estimates your ideal body weight based on your height and gender using four widely used clinical formulas. Compare results from the Devine, Hamwi, Robinson, and Miller methods to find a healthy target range.
How it works
Ideal body weight (IBW) formulas estimate a healthy weight based primarily on height and gender. They all use a base weight at 5 feet (60 inches) of height, then add a fixed amount for each inch above that.
For example, the Devine formula for men is: IBW = 50 kg + 2.3 kg × (inches over 5 ft). For women it is 45.5 kg + 2.3 kg per inch. This calculator converts your height in cm to inches, applies four formulas (Devine, Hamwi, Robinson, Miller), and averages them for a single estimate.
Tips
IBW formulas don't account for muscle mass, frame size, or body composition, so athletes may weigh more while still being healthy. Use the result as a guideline, not a strict target.
Consider pairing this with a BMI or body-fat estimate, and consult a healthcare professional for personalized goals.
FAQ
Which ideal weight formula is most accurate?
No single formula is definitive. The Devine formula is most common in medicine, but the Robinson and Miller versions were designed to refine it. Comparing all four gives a useful range.
Does ideal weight depend on age?
These classic formulas use only height and gender, not age. Healthy weight can shift slightly with age, so treat the result as a general reference.
Is ideal weight the same as a healthy weight?
Not exactly. IBW is a single estimate, while a healthy weight is usually a range. Factors like muscle, bone density, and frame size all matter.