Calculation Methods for Ideal Body Weight (IBW)
The Ideal Weight Calculator uses three internationally recognized formulas to determine your ideal body weight range. Each formula provides a slightly different perspective, and we use the average of all three to give you the most comprehensive and accurate result.
1. Devine Formula (1974)
The most commonly used and widely accepted method for calculating IBW.
2. Robinson Formula (1983)
An alternative calculation that provides a slightly different reference point.
3. Miller Formula (1983)
Another variation that offers additional perspective for IBW calculation.
How Our Calculator Works
Input Processing: Your height is converted to centimeters if entered in inches
Multi-Formula Calculation: All three formulas are applied to your measurements
Average Calculation: The results from all three formulas are averaged
Range Determination: A ±10% range is applied to the average for a healthy weight window
Unit Conversion: Results are displayed in both metric (kg) and imperial (lbs) units
Important Considerations
Age Requirement: Calculations are designed for adults 18 years and older
Reference Range: IBW provides a reference range, not a strict target weight
Individual Factors: Results may vary based on body composition, muscle mass, and other factors
Professional Guidance: Always consult healthcare professionals for personalized advice
Health Context: IBW is one of many health indicators and should be considered alongside other factors
Formula Limitations
These formulas are based on population studies and may not account for:
Body composition differences
Muscle mass variations
Ethnic and genetic factors
Age-related changes in body composition
Athletic or highly active lifestyles
The calculator provides a scientific starting point for understanding healthy weight ranges, but individual circumstances should always be considered when making health decisions.