Ideal Weight Calculator

About the Ideal Weight Calculator

What is the ideal weight for your height? The answer depends on which formula you use — and each was designed for a different purpose. Our ideal weight calculator applies four established formulas simultaneously: Devine (used in medical dosing calculations), Robinson, Miller, and Hamwi, giving you a range rather than a single number. The healthiest goal is typically a body weight that produces a BMI between 18.5 and 24.9.

How It Works

The four formulas for men: Devine = 50 + 2.3 × (height_in − 60); Robinson = 52 + 1.9 × (height_in − 60); Miller = 56.2 + 1.41 × (height_in − 60); Hamwi = 48 + 2.7 × (height_in − 60). For women, replace base values with 45.5, 49, 53.1, and 45.5 respectively. Heights are in inches above 5 feet. These formulas were developed in the 1960s-70s and are best understood as starting estimates — individual ideal weight varies based on muscle mass, bone density, and frame size.

Tips & Best Practices

• ✓Ideal weight ranges are more useful than single numbers — a 10 lb range is realistic.
• ✓Bodybuilders and highly muscular individuals will exceed these formulas without excess fat.
• ✓Small, medium, and large frame sizes can shift ideal weight by 10-15 lbs.
• ✓Focus on body composition (fat vs. muscle) rather than scale weight alone.
• ✓The healthy BMI range of 18.5-24.9 covers a wider weight range than many expect.

Who Uses This Calculator

People setting weight loss or gain goals, healthcare providers calculating medication dosages (the Devine formula is standard for drug dosing), and fitness coaches helping clients establish realistic targets all use ideal weight as a reference point.