Ideal Weight Calculator

Find your ideal body weight range using multiple formulas (Robinson, Miller, Devine, Hamwi). This tool processes all data locally in your browser. No information is ever sent to any server. Completely free, no registration required.

How to Use the Ideal Weight Calculator

1. Enter your input values above
2. Results update automatically
3. Copy or download the output

What is a Ideal Weight Calculator?

An Ideal Weight Calculator estimates a healthy weight range based on your height, gender, and body frame size using multiple scientifically validated formulas. Rather than giving a single 'perfect' number, it provides a range because healthy weight depends on many factors including muscle mass, bone density, and body composition. The calculator uses the Devine formula (used in clinical settings), Hamwi formula, Robinson formula, Miller formula, and BMI-based ranges to give a comprehensive picture of what might be a healthy target weight for your body.

How Does It Work?

Enter your height, gender, and select your body frame size (small, medium, large). The calculator applies five different formulas and averages the results or shows the range. Frame size — often overlooked — significantly affects ideal weight: a large-framed person can be 10-15% heavier than a small-framed person of the same height and still be at a healthy weight. You can estimate frame size by wrapping your thumb and middle finger around your opposite wrist: if they overlap, you're small-framed; if they just touch, medium; if they don't touch, large.

Formula

Devine Formula: Men: 50kg + 2.3kg per inch over 5ft | Women: 45.5kg + 2.3kg per inch over 5ft\nHamwi Formula: Men: 48kg + 2.7kg per inch over 5ft | Women: 45.5kg + 2.2kg per inch over 5ft\nRobinson Formula: Men: 52kg + 1.9kg per inch over 5ft | Women: 49kg + 1.7kg per inch over 5ft\nMiller Formula: Men: 56.2kg + 1.41kg per inch over 5ft | Women: 53.1kg + 1.36kg per inch over 5ft\nBMI Range: Weight = 18.5-24.9 × height(m)²

Who Uses This Tool?

• Individuals setting realistic weight loss or gain goals
• Healthcare providers discussing weight targets with patients
• Athletes determining competitive weight classes
• People assessing whether their current weight is in a healthy range
• Nutritionists creating personalized meal plans

Pro Tips

• Ideal weight formulas were developed from population averages — they don't account for your individual muscle mass or body composition
• Your 'best' weight is one you can maintain while feeling energetic, strong, and healthy — not necessarily what a formula says
• Frame size matters: measure your wrist circumference (dominant hand). Men: <6.5\
• = medium, >7.5\
• , 5.5-6.25\
• ,

Frequently Asked Questions about Ideal Weight Calculator

Which ideal weight formula is most accurate?

No single formula is perfect for everyone. The Devine formula is most commonly used in clinical settings. The BMI-based range (18.5-24.9) is the most widely accepted. The best approach is to consider the range across all formulas as a general guideline, not a rigid target.

Does ideal weight change with age?

Most formulas don't directly account for age, but ideal body composition does change — older adults naturally carry slightly more body fat and less muscle. The BMI healthy range stays the same, but some experts suggest a BMI of 23-27 may be healthiest for those over 65.

Free online Ideal Weight Calculator — no signup, 100% client-side processing. All data stays in your browser.