Ideal Weight Calculator
Compare four medical formulas and BMI guidance to identify a healthy weight range.
How to Use the Ideal Weight Calculator
Select your unit system, enter height and age, choose gender, and click Calculate. The tool converts measurements and applies four widely used clinical formulas to present ideal weight estimates.
Results show the Hamwi, Devine, Robinson, and Miller calculations, plus a healthy BMI range so you can compare each model side by side. Use the reset button to test additional heights or goal weights.
Understanding the Different Formulas
The Hamwi and Devine formulas were originally designed for medication dosing and hospital settings, while Robinson and Miller offer lighter adjustments. The BMI range provides context for general wellness guidelines.
No single equation fits every body type; comparing all four gives a realistic window that accounts for different medical perspectives.
Applying Ideal Weight Estimates Responsibly
Ideal weight is a starting point for goal setting, not a prescription. Consider lifestyle, activity level, and muscle mass. Athletes and individuals with higher bone density often weigh more than these formulas recommend.
Pair this tool with the BMI and body fat calculators for a fuller picture, and consult healthcare professionals before making significant changes to your nutrition or fitness plan.
Frequently Asked Questions
Which ideal weight formula should I trust?
Each formula was created for a different medical context. Review the range and consider your body composition; athletes or people with higher muscle mass may sit above formula estimates while remaining healthy.
Why does age matter for ideal weight?
Age influences muscle mass and hormonal changes. While the formulas focus on height and gender, age helps you interpret the range alongside BMI guidance.
How does BMI relate to ideal weight?
The calculator includes a healthy BMI range (18.5–24.9) to show where your weight would fall within public health recommendations.