An ideal weight calculator provides weight estimates using four established medical formulas that take height and gender as inputs.
About this calculator
An ideal weight calculator provides weight estimates using four established medical formulas that take height and gender as inputs. Unlike BMI which screens weight-for-height ratio, ideal weight formulas give a specific target weight range derived from clinical research.
The four formulas, Robinson (1983), Miller (1983), Devine (1974), and Hamwi (1964), were originally developed for medication dosing and clinical use. Results vary slightly between formulas, which is why seeing all four provides useful context.
Common uses
- Find an evidence-based target weight range for your height
- Compare results across different ideal weight formulas
- Use alongside BMI to get a more complete picture
- Set a realistic weight loss target
Frequently asked questions
Which ideal weight formula is most accurate?
No single formula is universally most accurate, each was developed for different purposes. The Hamwi formula is commonly used by dietitians. The Robinson formula is frequently referenced in clinical literature. Viewing results from all four gives a range that accounts for individual variation.
Is ideal weight different from healthy BMI weight?
Yes, they can differ. The healthy BMI range (18.5–24.9) gives a broader weight range, while ideal weight formulas give a specific target. The ideal weight may sometimes fall outside the BMI healthy range for very tall or short individuals, which shows the limitations of both approaches.