Ideal Weight Calculator by Age
Ideal body weight using the Devine, Robinson, Miller and Hamwi formulas.
About the Ideal Weight Calculator by Age
Ideal Weight Calculator by Age estimates your ideal body weight (IBW) using four widely-used clinical formulas — Devine, Robinson, Miller and Hamwi — and averages them so you end up with a single, defensible target.
How to use
- Choose gender.
- Enter age and height in centimetres.
- Click Calculate to see each formula's result and the average.
Benefits & key features
- Four trusted formulas let you triangulate instead of trusting one.
- Separate baselines for men and women.
- Returns a ±5% range — weight is a band, not a single number.
- Pairs with the TDEE calculator for daily calorie planning.
Pro tip
Clinical IBW formulas ignore frame size. Someone with a 'large frame' can be 5-10% above the formula average and still be perfectly healthy.