Ideal Weight Calculator

Estimates target weight using Robinson, Miller, Devine, and Hamwi formulas, plus a BMI-based healthy range.

Different formulas give a range of reasonable weights. The BMI band (18.5–24.9) is often the most practical reference — use the average of formulas as one data point, not a strict goal.

1. Choose units and sex, then enter height.
2. Compare results across formulas and the BMI 18.5–24.9 range.

Devine, Robinson, Miller, and Hamwi

x is inches over 5 feet. Robinson, Miller, and Devine are kilograms. Hamwi is pounds. Men: Robinson 52 + 1.9x, Miller 56.2 + 1.41x, Devine 50 + 2.3x, Hamwi 106 + 6x. Women: Robinson 49 + 1.7x, Miller 53.1 + 1.36x, Devine 45.5 + 2.3x, Hamwi 100 + 5x.

Source. Height is inches over 5 feet. Robinson, Miller, and Devine are kilograms: men 52 + 1.9x, 56.2 + 1.41x, and 50 + 2.3x; women 49 + 1.7x, 53.1 + 1.36x, and 45.5 + 2.3x. Hamwi is pounds: men 106 + 6x, women 100 + 5x. Pai and Paloucek, Annals of Pharmacotherapy, 2000, trace these equations to Devine (1974), Robinson (1983), Miller (1983), and Hamwi (1964). Pai and Paloucek, 2000.

Updated November 1, 2026

A 5'10" male averages about 160 lb across formulas, with a BMI healthy range of roughly 129–173 lb.

• Formulas were developed for clinical dosing — not perfection targets.
• Athletes and muscular builds may weigh more than formulas suggest.

Why do different ideal weight formulas disagree?

Each formula was derived from different populations and purposes (medical dosing, insurance tables). A range of results is normal.

Should I aim for the average formula result?

Use it as guidance alongside BMI range, body composition, and how you feel. A healthcare provider can help set a realistic personal target.