Ideal Body Weight Calculator
Calculate your ideal body weight using four widely-used medical formulas — Devine, Hamwi, Robinson, and Miller. Results are given in both kg and lbs for your height and gender.
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Frequently Asked Questions
How is ideal body weight calculated?
Multiple formulas exist. The Devine formula (common in medicine) gives: 50 kg + 2.3 kg per inch over 5 feet (men); 45.5 kg + 2.3 kg per inch over 5 feet (women). This tool shows results from several formulas for comparison.
Is ideal body weight the same as target weight?
Not necessarily. IBW formulas were originally developed for medication dosing in clinical settings. They do not account for muscle mass, bone density, or individual variation. Use them as a starting reference, not a strict target.
What is adjusted body weight?
Adjusted body weight accounts for the fact that obese individuals have some lean mass in excess tissue. It is used in pharmacokinetics: Adjusted BW = IBW + 0.4 × (Actual BW − IBW). This tool calculates it alongside IBW.