Healthy Weight Calculator

1. Select your unit system and gender. All ideal weight formulas are gender-specific because men and women have different average body compositions at any given height.
2. Enter your height. This is the primary input for all ideal weight calculations.
3. Enter your current weight (optional). This allows the calculator to tell you how much you are above or below the healthy range.
4. Select your frame size. Frame size adjusts the ideal weight estimate by about 10%. If your wrist circumference is small relative to your height, choose Small. If it is proportionally large, choose Large. Most people are Medium.
5. Read the results. The calculator shows the BMI-based healthy range and the ideal weight from four different clinical formulas, averaged together for a consensus estimate.

Four major formulas have been used clinically to estimate ideal body weight. All use inches over 5 feet as the key variable:

Hamwi (1964):
  Men:   106 lbs + 6 lbs per inch over 5 ft
  Women: 100 lbs + 5 lbs per inch over 5 ft

Devine (1974):
  Men:   50.0 kg + 2.3 kg per inch over 5 ft
  Women: 45.5 kg + 2.3 kg per inch over 5 ft

Robinson (1983):
  Men:   52.0 kg + 1.9 kg per inch over 5 ft
  Women: 49.0 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

Example for a 5'10" male (10 inches over 5 feet):

Hamwi:   106 + 6 × 10 = 166 lbs
Devine:  (50 + 2.3 × 10) × 2.205 = 160 lbs
Robinson:(52 + 1.9 × 10) × 2.205 = 156 lbs
Miller:  (56.2 + 1.41 × 10) × 2.205 = 155 lbs

These formulas were designed for pharmacological dosing, not fitness goals. The BMI-based healthy range (18.5 to 24.9) is broader and more commonly used for health screening.