❤️ Health & Lifestyle
Ideal Weight Calculator
Compare five major formulas — Devine, Robinson, Miller, Hamwi, and BMI-based — to find your ideal body weight range.
Formulas Used
All formulas use height in inches over 5 feet (60 inches). Frame size adjusts the base result by ±10%.
| Formula | Year | Men | Women |
|---|---|---|---|
| Devine | 1974 | 50 + 2.3 × in | 45.5 + 2.3 × in |
| Robinson | 1983 | 52 + 1.9 × in | 49 + 1.7 × in |
| Miller | 1983 | 56.2 + 1.41 × in | 53.1 + 1.36 × in |
| Hamwi | 1964 | 48 + 2.7 × in | 45.5 + 2.2 × in |
| BMI-based | — | 21.75 × m² | 20.75 × m² |
Frequently Asked Questions
Which ideal weight formula is the most accurate?
The Devine formula (1974) is the most widely used in clinical settings and pharmacology. However, no single formula is perfect for everyone. Each was derived from different population samples and statistical methods. It is best to look at the range produced by all formulas and consider your individual circumstances.
What does body frame size mean and why does it matter?
Body frame size refers to the breadth of your skeletal structure. People with larger frames naturally carry more bone and muscle mass, so their ideal weight is higher. Frame size is typically measured by wrist circumference relative to height. A small frame subtracts about 10% from the base ideal weight, while a large frame adds about 10%.
How does the BMI-based ideal weight method work?
The BMI-based method reverses the BMI formula using a target BMI value — 21.75 for men and 20.75 for women — which fall near the middle of the healthy BMI range (18.5–24.9). Ideal weight = target_BMI × height_in_meters². This gives a weight associated with the lowest health risk according to epidemiological studies.
What are the limitations of ideal weight formulas?
Ideal weight formulas do not account for muscle mass, body fat percentage, age, ethnicity, or overall health. Athletes with high muscle mass may weigh well above their "ideal" while being very healthy. These formulas are best used as general reference points, not definitive health targets. Always consult a healthcare professional for personalized advice.
Should I aim for the exact number or the range?
Aiming for the range is more practical and realistic. The range accounts for natural variation in body composition and frame size. Your ideal weight depends on many factors beyond height and gender — including muscle mass, bone density, and overall health. A healthy lifestyle matters more than hitting a specific number.