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Ideal body weight calculator
Calculate ideal body weight with the Devine formula, plus adjusted body weight — clinical references used by dietitians.
Enter your details above to see your result.
How it works
The Devine formula estimates ideal body weight (IBW) from height and sex. Adjusted body weight (AdjBW = IBW + 0.25 × (actual − IBW)) is used in clinical nutrition when actual weight is well above IBW, e.g. for some energy and protein calculations. These are reference estimates, not targets for any individual.
| Component | Value |
|---|---|
| Men, base (at 5 ft) | 50 kg |
| Women, base (at 5 ft) | 45.5 kg |
| Per inch over 5 ft | +2.3 kg |
How it's calculated
We use the Devine formula: a base of 50 kg (men) or 45.5 kg (women) for the first 152 cm (5 ft) of height, plus 2.3 kg for each additional inch. 'Ideal' here is a clinical reference point, not a personal target.
How to use this calculator
- Enter your details — such as age, weight, and height — in the fields above.
- Choose any options that apply, like your activity level, goal, or formula.
- Read your result instantly. It updates as you type — no sign-up required.
Sources: Devine BJ. Gentamicin therapy. Drug Intell Clin Pharm. 1974;8:650–655 (origin of the Devine ideal-body-weight formula).
These calculators give general estimates for healthy adults and are not medical or dietary advice. For individual guidance, consult a registered dietitian or your healthcare provider.
Reviewed by the NutraPlanner nutrition team. · Last updated 2026-06-17
Frequently asked questions
What is ideal body weight (IBW)?
IBW is a reference weight estimated from height and sex — here via the Devine formula. It's a clinical starting point (e.g. for some medication and nutrition calculations), not a personal goal weight.
What is adjusted body weight?
Adjusted body weight = IBW + 0.25 × (actual − IBW). Dietitians use it when actual weight is well above IBW, so energy and protein estimates aren't skewed by excess adipose tissue.
Should I aim for my ideal body weight?
Not necessarily — IBW is a population reference, not a target for any individual. A healthy weight depends on body composition, health, and goals; discuss with a dietitian or clinician.
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