Ideal Weight Calculator
The Ideal Weight Calculator computes ideal body weight (IBW) ranges based on height, gender, and age. The idea of finding the IBW using a formula has been sought after by many experts for a long time. Currently, there persist several popular formulas, and our Ideal Weight Calculator provides their results for side-to-side comparisons.
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ages 2 - 80
Ideal Weight Formulas
Robinson Formula (1983)
Developed by Dr. Robinson and colleagues, this formula is based on the Metropolitan Life Insurance Company's height-weight tables and is widely used in clinical settings.
Men: IBW = 52 + 1.9 × (height in inches - 60)
Women: IBW = 49 + 1.7 × (height in inches - 60)
Miller Formula (1983)
A modification of the Devine formula, the Miller formula provides slightly different coefficients for calculating ideal body weight.
Men: IBW = 56.2 + 1.41 × (height in inches - 60)
Women: IBW = 53.1 + 1.36 × (height in inches - 60)
Devine Formula (1974)
Originally developed for dosing medications, the Devine formula has become one of the most commonly used formulas for calculating ideal body weight.
Men: IBW = 50 + 2.3 × (height in inches - 60)
Women: IBW = 45.5 + 2.3 × (height in inches - 60)
Hamwi Formula (1964)
One of the oldest formulas, the Hamwi formula was developed based on the Metropolitan Life Insurance Company's height-weight tables from 1959.
Men: IBW = 48 + 2.7 × (height in inches - 60)
Women: IBW = 45.5 + 2.2 × (height in inches - 60)
Healthy BMI Range
Body Mass Index (BMI) is a measure of body fat based on height and weight. A healthy BMI range is typically considered to be between 18.5 and 24.9.
BMI = weight (kg) / height (m)²
Healthy Range: 18.5 - 24.9
Important Considerations
Individual Variation: Ideal weight formulas provide estimates based on population averages. Individual factors such as muscle mass, bone density, body composition, and frame size can significantly affect your personal ideal weight.
Age Considerations: These formulas were developed primarily for adults. For children and adolescents, growth charts and pediatric BMI percentiles are more appropriate.
Health vs. Aesthetics: The "ideal" weight for health may differ from what's considered aesthetically ideal. Focus on overall health, body composition, and how you feel rather than just the number on the scale.
Consult Healthcare Professionals: For personalized weight recommendations, especially if you have health conditions or specific fitness goals, consult with a healthcare provider or registered dietitian.