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Smart Financial Calculators

Ideal Weight Calculator

Estimate your ideal body weight with the Robinson, Miller, Devine and Hamwi formulas, plus the healthy BMI weight range for your height. For information only.

Each formula starts from a base weight at 5 feet (152 cm) and adds a set amount per inch above that. For example, Devine (1974): men 50 kg + 2.3 kg per inch, women 45.5 kg + 2.3 kg per inch.

The healthy BMI range (18.5–24.9) gives a wider band that many doctors prefer.

Frequently asked questions

Why do the formulas give different answers?

They were fitted to different populations and purposes (mostly drug dosing). None accounts for muscle or frame size.