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⚖️ Ideal Weight Calculator
Find your ideal body weight range using four clinically-used formulas.
Your Measurements
Average Ideal Weight
159.4 lb
across four classic formulas
Robinson (1983)
156.5 lb
Devine (1974)
160.9 lb
Miller (1983)
155.0 lb
Hamwi (1964)
165.3 lb
Healthy BMI Range (18.5–24.9)
128.9 lb – 173.5 lb
Ideal weight formulas are clinical approximations based on height and sex alone. They do not account for body composition, muscle mass, age, or frame size. Always consult a healthcare professional.
How This Tool Works
This calculator estimates your ideal weight range using multiple clinically-referenced formulas (Devine, Robinson, Miller, and Hamwi), which were originally developed for medication dosing and have since been widely adopted for general health guidance. Rather than giving you a single number, it provides a range because "ideal weight" depends on factors like muscle mass, bone density, body composition, and frame size that a height-based formula cannot capture. Use these ranges as reference points — not absolute targets — alongside body fat percentage and how you feel physically.
💡 Tips & Best Practices
- 1The "ideal weight" formulas were designed for average body compositions — athletes and people with high muscle mass will weigh more than the calculated range and still be perfectly healthy.
- 2Focus on body composition (muscle vs. fat) rather than a specific number on the scale.
- 3Weighing yourself at the same time each day (morning, after bathroom, before food) gives the most consistent readings.
- 4Weight fluctuates 2–5 pounds daily due to water retention, food in your digestive system, and hormonal cycles.
Frequently Asked Questions
Which ideal weight formula is most accurate?
No single formula is definitive. The Devine formula is the most widely used but tends to give slightly lower values. The Robinson and Miller formulas are considered more moderate. Our calculator shows all four so you can see the full range.
Should I target the exact "ideal weight" number?
No. Think of it as a healthy range, not a precise target. Your actual ideal weight depends on your muscle mass, frame size, and overall health markers (blood pressure, blood sugar, cholesterol). If you feel good, move well, and your health markers are normal, your weight is probably fine.
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