Calculate your ideal body weight using 5 proven clinical formulas: Devine, Robinson, Miller, Hamwi, and BMI-based. Supports metric and imperial.
Devine (1974) — Most used in medicine for drug dosing. Men: 50 + 2.3×(H−60). Women: 45.5 + 2.3×(H−60). H in inches.
Robinson (1983) — Refinement of Devine. Men: 52 + 1.9×(H−60). Women: 49 + 1.7×(H−60).
Miller (1983) — Gives higher values. Men: 56.2 + 1.41×(H−60). Women: 53.1 + 1.36×(H−60).
Hamwi (1964) — Oldest formula. Men: 48 + 2.7×(H−60). Women: 45.5 + 2.2×(H−60).
BMI-based (BMI 22) — Midpoint of healthy BMI range. IBW = 22 × height²(m).
Ideal body weight (IBW) is an estimated weight range considered optimal for a given height, used primarily in clinical medicine for drug dosing, nutritional assessment, and health risk estimation. It was originally developed for medication dosing, not as a beauty standard. Multiple formulas exist, each with slightly different results.
The Devine formula (1974) is the most widely used in clinical medicine, especially for drug dosing. The BMI-based formula (targeting BMI 22) is often considered the most practical for general health. No single formula is perfect for everyone — frame size, muscle mass, and ethnicity all affect the ideal weight for an individual.
Not exactly. Healthy weight is defined by a BMI of 18.5–24.9, which gives a range. IBW formulas give a single number. The BMI-based IBW (BMI 22) falls in the middle of the healthy range. The other formulas — Devine, Robinson, Miller, Hamwi — tend to suggest slightly lower weights and were originally designed for clinical purposes, not general wellness.
Yes. People with a small bone frame may have an IBW 10% lower than the formula result, while those with a large frame may have an IBW 10% higher. Wrist circumference or elbow breadth are often used to estimate frame size. This tool shows the standard IBW; add or subtract 10% for your frame size.
To lose weight: create a calorie deficit of 500 kcal/day through diet and exercise to lose about 0.5 kg/week safely. To gain weight: eat a calorie surplus of 300–500 kcal/day with adequate protein (1.6 g/kg) and resistance training to gain lean mass. Always consult a dietitian for a personalised plan.