Ideal Weight Calculator
Robinson formula — estimated healthy weight with ±10% range in kg and lbs for adult screening
Your healthy weight range
Enter sex and height, then tap Calculate for Robinson ideal weight and ±10% range.
Estimated healthy weight
Screening estimate only. Compare with our BMI calculator and discuss targets with a clinician.
Robinson formula
Men
52 kg + 1.9 kg × each inch over 5 feet (152 cm baseline in metric conversion).
Women
49 kg + 1.7 kg × each inch over 5 feet.
Not a prescription
Athletes and muscular adults may weigh more than this estimate while remaining healthy.
Frequently asked questions
What is the Robinson formula?
Robinson (1983) estimates ideal body weight from height and sex. It is one of several clinical formulas used for screening, not a universal target.
What does the ±10% range mean?
A band around the ideal estimate acknowledges normal variation in frame size, muscle mass, and ethnicity. Many healthy adults fall outside a single number.
Should I aim for my ideal weight?
Use this as context alongside BMI, waist measure, and clinical advice. Athletes and muscular adults may weigh more than the formula suggests while remaining healthy.