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Ideal Weight Calculator

Find your ideal body weight using five different medical formulas based on your height and gender.

Ideal Weight Results

About the Ideal Weight Calculator

There is no single universally agreed "ideal" body weight — different researchers have developed different formulas over the decades. This calculator shows results from five widely cited formulas to give you a range of estimates.

How to Use

  1. Select your gender and unit system.
  2. Enter your height.
  3. Click Calculate Ideal Weight.
  4. Results show all five formulas plus the healthy BMI weight range.

The Five Formulas

Hamwi (1964): Men: 48 kg + 2.7 kg per inch over 5 ft. Women: 45.5 kg + 2.2 kg per inch over 5 ft.

Devine (1974): Men: 50 kg + 2.3 kg per inch over 5 ft. Women: 45.5 kg + 2.3 kg per inch over 5 ft.

Robinson (1983): Men: 52 kg + 1.9 kg per inch over 5 ft. Women: 49 kg + 1.7 kg per inch over 5 ft.

Miller (1983): Men: 56.2 kg + 1.41 kg per inch over 5 ft. Women: 53.1 kg + 1.36 kg per inch over 5 ft.

Healthy BMI Range: Weight range for BMI 18.5–24.9.

Example

Male, 5'9" (69 inches, 9 inches over 5 ft):
Hamwi: 48 + 9×2.7 = 72.3 kg · Devine: 50 + 9×2.3 = 70.7 kg

Frequently Asked Questions

No single formula is universally "best." Each was derived from different populations and research contexts. The healthy BMI range (18.5–24.9) is the most commonly used clinical guideline today.
These formulas were originally developed for drug dosing in clinical settings, where a quick height-based estimate of "lean body mass" was needed. They don't account for body frame size, muscle mass, or age.
Not exactly. The BMI healthy range (18.5–24.9) represents a statistical correlation between weight and reduced health risk. Individual ideal weight depends on body composition, age, frame size, and other factors.