Our free ideal weight calculator uses four established medical formulas — Robinson, Miller, Devine, and Hamwi — to estimate a healthy weight range for your height and sex. Rather than presenting a single number, this calculator shows results from all four formulas so you can see the full range of medically-based recommendations.
Ideal body weight formulas were originally developed for clinical use in determining medication dosages and other medical calculations. They have since been widely adopted as general guidelines for healthy weight ranges. This ideal weight calculator works for both imperial and metric units and is suitable for adults in the USA and Canada.
🎯 Ideal Weight Calculator
🎯 Ideal Weight Estimates
Ideal weight formulas are general guidelines and do not account for individual body composition. Consult a healthcare provider for personalized advice.
How to Use the Ideal Weight Calculator
- Select your sex.
- Select your preferred unit system — Imperial (ft/in) or Metric (cm).
- Enter your height.
- Click Calculate Ideal Weight to see results from all four formulas and an average.
When Should You Use an Ideal Weight Calculator?
Use the ideal weight calculator when setting a weight goal for health or fitness purposes. In particular, it gives you a medically-grounded range rather than an arbitrary number. Furthermore, comparing the four formula results shows you the spread of medical opinion on what constitutes a healthy weight for your frame.
Moreover, the ideal weight calculator is best used alongside BMI and body fat percentage to build a complete picture of your health. Remember that these are general guidelines — individual factors like bone density, muscle mass, and overall health are equally important considerations.
Understanding Ideal Weight vs Healthy Weight
Here is what you should know about ideal weight recommendations:
- No single formula is perfect — Each formula was developed from different population samples and may vary by body type.
- Frame size matters — People with larger bone structures naturally weigh more at the same height.
- Muscle mass is not accounted for — Athletes may weigh more than the ideal range while being perfectly healthy.
- Focus on health, not numbers — Blood pressure, cholesterol, blood sugar, and energy levels are more meaningful health indicators.
- Set realistic goals — Aiming for the middle of the range shown is a reasonable and achievable target for most people.
Frequently Asked Questions About the Ideal Weight Calculator
Which ideal weight formula is most accurate?
No single formula is universally most accurate. The Robinson formula is widely cited in medical literature. Using the average of all four formulas gives a more balanced estimate than relying on any one formula alone.
Is ideal weight different for men and women?
Yes. All four formulas calculate different ideal weights for men and women at the same height, reflecting natural differences in body composition and bone density between sexes.
Related Calculators
Furthermore, you might find these related tools useful: BMI Calculator — Body Fat Calculator — BMR Calculator — Calorie Calculator
Disclaimer: Ideal weight calculations are general guidelines only. Consult a healthcare provider for personalized weight and health advice.