Calculate your ideal body weight using multiple proven formulas. Compare results from Robinson, Miller, Devine, and Hamwi methods to get a comprehensive view of your healthy weight range.
Example: Male, 5'10" (178 cm) → Ideal weight range: 68-75 kg (150-165 lbs) depending on formula
What is ideal body weight?
Ideal body weight (IBW) is an estimate of a healthy weight based mainly on your height and sex. It was originally created to help calculate medication doses and is now widely used as a simple health reference.
The four formulas we use
Because no single formula is perfect, this tool reports four well-known equations and an average:
Robinson (1983)
Miller (1983)
Devine (1974)
Hamwi (1964)
Each uses a base weight at 5 feet of height plus an increment for every inch above that, with different constants for men and women.
How to use it
Select metric or imperial units.
Enter your height.
Choose your gender.
Calculate to see each formula's result, the average and a healthy range.
Important limitations
IBW formulas only consider height and sex — they ignore muscle mass, frame size and body composition. They are a rough guide, not a target. For a fuller picture, combine this with BMI and waist measurements, and consult a healthcare professional.
Frequently Asked Questions
Which ideal weight formula is best?
There is no single best formula. The Devine and Robinson formulas are common in clinical settings; this tool averages four so you get a balanced range.
Is ideal weight the same as a healthy weight?
Not exactly. Ideal body weight is a height-based estimate, while a healthy weight also depends on muscle, fat distribution and overall health.
Does body frame size matter?
Yes. People with larger frames or more muscle may sit above their calculated IBW yet still be perfectly healthy.
Does this tool store my data?
No. Everything runs entirely in your browser. Nothing you enter is uploaded, saved, or shared.