Ideal Weight Calculator
Estimate ideal body weight using several standard formulas and healthy BMI range.
Enter Values
Result
Enter values above and click Calculate to see your result.
AI Assistant
Ask about this calculator
I can help you understand the ideal weight calculator formula, interpret your results, and answer follow-up questions.
Try asking
Formula
The tool reports results from multiple formulas and an average reference range.
Worked Example
Understanding Ideal Body Weight
- The Devine formula (1974) is widely used in medicine for drug dosing and is considered a reasonable general estimate
- The Robinson formula (1983) tends to produce slightly higher estimates for taller individuals
- The Miller formula (1983) generally gives the lowest estimates and may suit smaller-framed individuals better
- Body frame size (small, medium, large) adjusts the range because bone structure affects healthy weight independently of height
Ideal weight formulas are population-level estimates. Your personal ideal weight depends on body composition, fitness level, and overall health markers, not just height.
You can also calculate changes using our BMI Calculator, Body Fat Calculator or Calorie Calculator.
Frequently Asked Questions
Why do the formulas give different results?
Each formula was developed from different population studies using different statistical methods. The Devine, Robinson, Miller, and Hamwi formulas each reflect slightly different data sets and assumptions about the relationship between height and healthy weight.
Is ideal weight a strict target?
No. Ideal weight is a reference range, not a medical prescription. A healthy weight depends on your body composition, muscle mass, bone density, and overall health markers, not just a number on a scale.
Which formula should I trust most?
The Devine formula is most commonly used in clinical settings. However, comparing all four formulas gives you a realistic range. If your weight falls within the range of all four, you are likely in a healthy zone for your height.
Does body frame size matter?
Yes. A large-framed person can healthily weigh more than a small-framed person of the same height. Frame size is typically estimated from wrist circumference or elbow breadth.
AI Assistant
Ask about this calculator
I can help you understand the ideal weight calculator formula, interpret your results, and answer follow-up questions.
Try asking
Related Calculators
Secure and Private
All calculations run locally. Your data never leaves your browser.
Fun and Lifestyle Tools Powered by Calculory AI