Ideal Weight Calculator
Target weight from four clinical formulas plus BMI range.
Optional — used to show the gap to your target.
Wrap your thumb and index finger around the opposite wrist: overlapping means small, touching means medium, not meeting means large.
These formulas were built for clinical dosing, not body composition. They ignore muscle mass entirely, so athletes will read as overweight. Treat the range as a guide, not a goal.
Ideal weight
70.0 kg
range 69 kg – 72 kg
Formula comparison
| Formula | Notes | Ideal weight |
|---|---|---|
| Devine (1974) | Clinical standard, used for drug dosing. | 70.5 kg |
| Robinson (1983) | A revision of Devine; lower for taller people. | 68.9 kg |
| Miller (1983) | Flattest curve; highest at short heights. | 68.7 kg |
| Hamwi (1964) | The oldest; steepest increase with height. | 72.0 kg |
How the Ideal Weight Calculator works
There is no single correct ideal weight, so this calculator shows four established clinical formulas side by side along with the healthy BMI range. Treat the spread between them as the realistic target zone rather than chasing one exact number.
Sources
Not medical advice. This calculator gives a general estimate, not medical advice. It cannot account for your individual health, medical history, or medication. Talk to a qualified healthcare professional before acting on any result.
Frequently asked questions
Which ideal weight formula should I use?
Devine is the most widely used in clinical settings, originally for drug dosing. Robinson and Miller give slightly lower figures and fit smaller frames better. Rather than picking one, use the range they produce together — the healthy BMI range is usually the most practical target.
Does frame size matter?
Yes, by roughly 10%. Measure your wrist circumference: relative to height, a smaller wrist indicates a small frame and a target near the lower end of the range, a larger wrist the opposite. This calculator adjusts for the frame size you select.
Do these formulas work for athletes?
Poorly. They are height-based and ignore muscle mass entirely, so a trained athlete will often read as overweight. If you carry significant muscle, body fat percentage is a far more meaningful target than scale weight.
Is ideal weight different for men and women?
Yes. All four formulas start from a different base weight at 5 feet for men and women — typically 2-4 kg lower for women — then add a fixed amount per additional inch of height.