Discover the weight range that scientifically aligns with your body frame and height.
Enter details to see ideal weight
Ideal Body Weight (IBW) was originally introduced to estimate dosages for medical use, but it has become a popular metric for individuals aiming for a healthy weight. It represents a weight that is statistically associated with maximum life expectancy for a given height.
Key Concept: IBW is not a single "perfect" number but rather a reference point. A healthy body can exist slightly above or below this specific value depending on muscle mass and bone density.
Different researchers have developed unique formulas over the decades. Our calculator uses the four most respected ones:
The most widely used formula today. It was derived from 1983 Metropolitan Life Insurance tables.
Often gives a lower estimate than Robinson. It is sometimes preferred for nutritional assessments.
Originally for drug dosing. It is the standard for calculating IBW in clinical settings.
A very simple "rule of thumb" formula: 106 lbs for first 5 feet + 6 lbs per inch (Men).
While useful, IBW formulas are based on averages and old data (mostly from the 1960s-80s). They do NOT account for:
There is no single "correct" one. The Robinson formula is widely accepted for general populations, while Devine is standard in medicine.
BMI calculates a range (e.g., 18.5-24.9), while IBW gives a specific number. They are complementary tools.
