Ideal Weight Calculator
Calculate your ideal body weight using the Devine, Robinson, Miller, and Hamwi formulas.
Informational estimate only. Not medical advice. Formulas are population estimates — individual ideals vary.
Frequently Asked Questions
Which formula is most accurate?
No single formula is universally 'correct' — they're estimates derived from mid-20th century population data. Devine is the most widely used in clinical practice for drug dosing.
What's the healthy BMI range?
18.5-24.9 kg/m² is classified as 'normal weight' by the WHO. This range is shown based on your height as a sanity check alongside the formulas.
Why do formulas disagree?
They were developed from different populations and assumptions. Typical spread is ±5-10 lb across formulas — any value in that range is reasonable for an 'ideal'.
Is this medical advice?
No. This tool is for informational purposes only and is not a substitute for advice from a registered dietitian or physician.