Ideal Weight Calculator
Calculate your ideal body weight using four popular formulas: Devine, Robinson, Miller, and Hamwi. Compare results side by side.
This calculator is for informational purposes only and should not replace professional medical advice.
How It Works
This calculator computes ideal body weight using four established formulas, all based on height and gender:
Devine (1974): Men: 50 + 2.3 kg per inch over 5 ft | Women: 45.5 + 2.3 kg per inch over 5 ft
Robinson (1983): Men: 52 + 1.9 kg per inch over 5 ft | Women: 49 + 1.7 kg per inch over 5 ft
Miller (1983): Men: 56.2 + 1.41 kg per inch over 5 ft | Women: 53.1 + 1.36 kg per inch over 5 ft
Hamwi (1964): Men: 48 + 2.7 kg per inch over 5 ft | Women: 45.5 + 2.2 kg per inch over 5 ft
Frequently Asked Questions
What are the ideal weight formulas?
There are four commonly used ideal weight formulas: Devine (1974), Robinson (1983), Miller (1983), and Hamwi (1964). Each uses height and gender to estimate an ideal body weight, but they produce slightly different results.
Which ideal weight formula is most accurate?
The Devine formula is the most widely used in clinical settings and is the basis for many drug dosing calculations. However, no single formula is universally 'best' — the average of all four gives a reasonable target range.
Why do I need to be at least 5 feet tall?
These formulas were designed for adults 5 feet (152 cm) and taller. They use the number of inches over 5 feet as a variable, so they don't produce meaningful results below that height.
Should I aim for my exact ideal weight?
Ideal weight formulas provide a general guideline, not a strict target. A healthy weight range typically spans about 10% above or below the calculated ideal. Factors like muscle mass, bone density, and body composition are not accounted for.