Ideal Weight Calculator
Find a healthy weight range for your height, based on BMI, plus the classic 'ideal body weight' formulas doctors have used for decades. There is no single perfect number.
How the ideal weight calculator works
Rather than one magic number, this tool gives a healthy weight range from the World Health Organization body mass index bands, then shows what the classic medical formulas estimate for your height.
The healthy weight range
The primary result is the weight range that puts your BMI between 18.5 and 24.9, the band most adults are healthiest in. It is calculated from your height, and most people do well anywhere inside it.
The classic formulas
Devine, Robinson, Miller, and Hamwi are formulas first built to dose medication and quickly estimate 'ideal body weight' from height and sex. They are useful reference points, but they predate modern body-composition science and tend to cluster near the lower healthy range.
Frequently asked questions
What is my ideal weight?
There is no single ideal weight. A healthy range for your height, where BMI sits between 18.5 and 24.9, is a better target than one number. This calculator shows that range plus several classic formula estimates, so you can see the spread.
How is ideal weight calculated?
This tool calculates a healthy weight range from your height using BMI 18.5 to 24.9, and also runs the Devine, Robinson, Miller, and Hamwi formulas, which estimate ideal body weight from your height and sex. Results show in kg or pounds.
Which ideal weight formula is most accurate?
None is clearly best for everyone. The formulas were designed for clinical estimates, not body-composition accuracy, and they tend to land near the lower end of the healthy range. The BMI-based range is usually the more practical guide for most people.
Does ideal weight account for muscle?
No. Like BMI, these formulas use only height and sex, so they cannot tell muscle from fat. A muscular person may sit above the ideal number while being very lean. Use the range as a guide, not a verdict, and consider body composition too.
Is a higher weight always unhealthy?
Not necessarily. Health depends on far more than a number on a scale: body composition, fitness, diet, and where you carry weight all matter. The healthy range is a starting point, and a doctor or dietitian can help you set goals that fit your body.