Educational only — not medical advice. See full disclaimer. Disclaimer

Ideal weight calculator

“Ideal” weight formulas are historical clinical references. Healthy weight is personal and should include lifestyle, labs, and professional guidance.

Live calculation

Sex

Devine (1974)

25.8 kg

56.9 lb

Robinson (1983)

26.1 kg

57.5 lb

Formula comparison at your height

Devine and Robinson reference weights versus weight at BMI 22.5 (mid-normal) for the same height — for context, not a prescription. Educational illustration only — not a diagnosis or personal target.

Devine BJ. Drug Intell Clin Pharm. 1974; Robinson JD, et al. Am J Clin Nutr. 1983.

Evidence-informed guides tied to this calculator — still educational, not personal medical advice.

How this calculator works

Open any section below for the underlying method, how to read your results, practical tips, and limits. This site is for education only—not medical advice or a personal care plan.

Formula and method

We show reference weights from the Devine (1974) and Robinson (1983) formulas based on height and sex, plus a BMI midpoint example for context.

These formulas were developed for drug dosing and teaching—not as modern definitions of health for every individual.

How to read your result

If the two classics disagree, that is expected; they encode different assumptions.

A healthy weight range for you may sit above or below these numbers depending on muscle mass, bone structure, chronic conditions, and performance goals.

Practical tips

Use height without shoes; small height errors move the reference weights noticeably.

Discuss sustainable weight goals with a clinician or dietitian who knows your history rather than anchoring to a single formula.

For adolescents, use pediatric growth charts—not this adult tool.

Limitations

Reference-weight equations do not reflect body composition, ethnicity-specific considerations, or pregnancy.

Never use this output to justify unsafe restriction or to override medical advice.

Sources, formulas & further reading

Based on: Devine (1974) and Robinson (1983) reference-weight formulas.

For additional clinical context, see independent references from the publishers below (WHO, CDC, PubMed, Medscape, ACE, ACOG, NIH, NCBI, USDA — as applicable).

Medical disclaimer

This tool is for informational and educational purposes only. It does not constitute medical advice, diagnosis, or treatment. Always consult your doctor or qualified healthcare professional before making any health-related decisions. Results are estimates only.

Last medically reviewed: March 2026

Content last updated: March 30, 2026