DIY Cost Tools
Ideal Weight Calculator
HEALTH CALCULATOR
Compare the Devine, Robinson, Miller, and Hamwi adult ideal-weight formulas using height and the sex input used by each equation.
How it works
Four historical formulas begin with a base weight at 5 feet and add a formula-specific amount for each additional inch.
Formula
Estimated weight = 5-foot base + increment × inches above 5 feet
Important limits
- “Ideal weight” formulas do not measure body composition, health, ethnicity, frame size, disability, or personal goals.
- They were developed for limited purposes and should not define self-worth or diagnose health.
- Discuss weight concerns with a qualified clinician.
Frequently asked questions
Why do the formulas disagree?
They use different base weights and increments and were developed from different assumptions.
Is the average a medical target?
No. It is only a mathematical average of four historical formulas.
Understanding ideal-weight estimates
Ideal-weight formulas provide broad reference values based mainly on height and, in some formulas, sex. They do not directly measure body composition, muscle mass, bone structure, age-related changes, pregnancy, disability, or an individual’s health history.
Compare formulas as a range rather than treating one number as a required target. Athletes and muscular people may weigh more without having excess body fat, while weight alone can miss health risks in other cases. Trends in waist measurement, blood pressure, lab results, fitness, nutrition, and wellbeing may provide more useful context. Do not use the estimate to diagnose a condition or make rapid weight changes; discuss an appropriate goal with a qualified healthcare professional.
Review notes
The page presents multiple formulas together and emphasizes their limitations. Last reviewed September 30, 2026.