Calculate your ideal body weight using four clinically-used formulas (Hamwi, Robinson, Miller, and Devine). These provide a healthy weight range to target — not a single perfect number.
Enter Your Measurements
Results
Ideal Weight (Hamwi)
166
lbs
Ideal Weight (Robinson)
157
lbs
Healthy Weight Range Low
149
lbs
Healthy Weight Range High
183
lbs
Formula
How to Use This Calculator
How to Use
- 1
Enter your height and select your sex.
- 2
Select your frame size (measure wrist circumference if unsure: small <6.5", medium 6.5–7.5", large >7.5" for women).
- 3
Use the range, not the exact number, as your target.
Frequently Asked Questions
Frequently Asked Questions
Are ideal weight formulas accurate?
In-Depth Guides
Understanding BMI: What It Measures and Its Limitations
Learn what BMI actually measures, why it misclassifies muscular people, and what better alternatives like body fat percentage and waist circumference offer.
Understanding BMI: What It Measures and Where It Fails
A clear-eyed look at BMI — what it actually measures, its well-documented limitations, and better alternatives for health assessment.
BMI Limitations and Better Alternatives for Measuring Health
Why BMI is flawed as a health indicator, who it fails most, and which alternative measurements provide better insight into body composition and health risk.
Ideal Body Weight vs. Goal Weight: What's the Difference?
Understand the difference between medically-defined ideal body weight and a personal goal weight, how both are calculated, and which one to actually use.
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About This Calculator
This calculator uses the formula: Hamwi Male: 106 lbs + 6 lbs/inch over 5ft; Female: 100 lbs + 5 lbs/inch over 5ft (±10% for frame). All calculations follow industry-standard methods. Results are estimates — always verify with a licensed professional for structural or code-compliant work.
Built and maintained by the CalcSmart team. Last updated March 2026.
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