Formulas Explained
Devine (1974): Men: 50 + 2.3 × (inches over 5ft). Women: 45.5 + 2.3 × (inches over 5ft). Most widely used in clinical settings.
Miller (1983): Men: 56.2 + 1.41 × (inches over 5ft). Women: 53.1 + 1.36 × (inches over 5ft). Better for taller people.
Robinson (1983): Men: 52 + 1.9 × (inches over 5ft). Women: 49 + 1.7 × (inches over 5ft). Similar to Devine but slightly lower.
Hamwi (1964): Men: 48 + 2.7 × (inches over 5ft). Women: 45.5 + 2.2 × (inches over 5ft). Adjusts for frame size (±10%).
Frequently Asked Questions
What is ideal body weight?
Ideal body weight (IBW) is an estimated healthy weight based on height and gender. Originally developed for drug dosage calculations. Multiple formulas exist, each giving slightly different results.
Which formula is most accurate?
No single formula is universally best. Devine is most widely used clinically. Miller is better for taller people. Comparing multiple formulas gives a useful range.
How does the Devine formula work?
Devine (1974): Men: 50 + 2.3×(height in inches − 60). Women: 45.5 + 2.3×(height in inches − 60). Most commonly used IBW formula in medicine.
Ideal weight vs healthy weight?
Ideal weight is a specific target from a formula. Healthy weight is a broader BMI range (18.5-24.9) accounting for individual variation in frame, muscle, and other factors.
Does frame size affect ideal weight?
Yes. Larger frames carry more weight healthily. The Hamwi formula adjusts ±10% for large/small frames. A simple wrist measurement can estimate frame size.
Is ideal weight the same for all ages?
Most formulas are for adults 18+. They don't account for age-related body composition changes. Older adults may benefit from slightly higher weight for bone health.
Can athletes weigh more than ideal?
Yes, muscular athletes often exceed IBW formulas. Muscle is denser than fat, so a muscular person can be perfectly healthy above their calculated ideal weight.
How much should I weigh for my height?
Use this calculator to compare formulas. BMI healthy range (18.5-24.9) provides a practical target. For 170cm, that's roughly 53-72 kg. Individual factors matter most.