Ideal Weight Calculator
Compare ideal weight estimates from four scientific formulas and the healthy BMI range for your height.
About the Formulas
Hamwi (1964) — Originally developed for insulin dosing. Males: 106 lbs for 5 ft + 6 lbs per inch over 5 ft. Females: 100 lbs + 5 lbs/inch.
Devine (1974) — Widely used in pharmacology and ICU settings. Males: 50 kg + 2.3 kg/inch over 5 ft. Females: 45.5 kg + 2.3 kg/inch.
Robinson (1983) — Derived from Metropolitan Life tables. Males: 52 kg + 1.9 kg/inch over 5 ft. Females: 49 kg + 1.7 kg/inch.
Miller (1983) — Another Met Life derivation. Males: 56.2 kg + 1.41 kg/inch over 5 ft. Females: 53.1 kg + 1.36 kg/inch.
How to use
- Select your sex and preferred units (Imperial or Metric).
- Enter your height.
- Optionally enter your current weight to see your current BMI alongside the ideal range.
- Click Calculate to see results from all four formulas.
- The green healthy BMI range (18.5–24.9) is the most widely accepted guideline.
- These formulas were designed for clinical use — use them as a general reference only.
About this Ideal Weight
Use this free ideal weight calculator to compare several common healthy-weight formulas and ranges. It is useful for general reference, fitness planning, and understanding different estimate methods. No signup is required, and the tool works on phones, tablets, and desktop browsers.