What ideal body weight means
Ideal body weight is an estimate of a healthy weight for your height, based on well-known formulas such as the Devine, Robinson, Miller and Hamwi equations. Enter your height, age and sex above to see the range these methods suggest.
Why it is a range, not one number
Different formulas give slightly different answers, and none can account for your muscle mass, frame size or overall health. Read the result as a healthy range to aim towards rather than an exact target. The WHO healthy BMI band (18.5–24.9) is another way to sanity-check it.
Using the result sensibly
A healthy weight is only one part of health. If your weight is far from the suggested range, or you are planning to lose or gain weight, speak with a doctor or dietitian who can advise based on your whole situation rather than a formula alone.
Frequently asked questions
Which formula is best? They are all approximations; the calculator shows the range so you can compare them.
Is this a weight-loss target? No — it is a reference range. Any weight-change plan is best made with a professional.
About this tool
This tool is provided for general information and education only. It is not a substitute for professional medical advice, diagnosis or treatment — please read our Medical Disclaimer. Learn how we build, review and update our tools in our Editorial Policy.
Check These Calculators
Free tools you might find useful