Find your healthy weight range using four clinical formulas — Devine, Robinson, Miller, and Hamwi — plus the BMI-based healthy range. Compare them all at a glance.
There is no single universally agreed ideal weight — it varies by formula, frame size, sex, age, and individual health factors. The four formulas below were developed for clinical use and remain the most widely referenced in medical and nutrition research.
All formulas below use height in inches and produce a result in kilograms. The first 5 feet (60 inches) is the baseline; each additional inch adds a fixed amount depending on sex and formula.
The BMI healthy range (18.5–25) tends to produce a wider band than the clinical formulas above. Neither approach accounts for muscle mass, bone density, age, or ethnicity — both are population-level estimates. Use these numbers as a general reference, not a precise target.
Not perfectly. These formulas were validated on Western adult populations and do not fully account for frame size, muscle mass, age, or ethnicity. Athletes and highly muscular individuals will typically weigh more than these formulas suggest without being "overweight" in any meaningful sense. Use the results as a general reference point, not a clinical diagnosis.
The Devine formula is the most commonly cited in clinical settings (particularly for medication dosing). For a general health and fitness target, the average across all four formulas provides a balanced estimate that smooths out the individual quirks of any single formula — which is what this calculator reports as "Average Ideal Weight."
The World Health Organization defines a healthy BMI as 18.5–24.9. Below 18.5 is considered underweight; 25–29.9 is overweight; 30 and above is obese. BMI has known limitations as a health metric — it does not distinguish between fat and muscle, and its thresholds may not apply equally across different ethnic backgrounds.