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Miraç Özdemir
Body Measurements & Weight

Ideal Weight Calculator (Devine, Robinson, Miller, Hamwi)

Estimate your ideal body weight from height and sex with four classic formulas (Devine, Robinson, Miller, Hamwi), their average and the BMI-based healthy weight range.

Version 3

Things to keep in mind:

  • The formulas are not defined below 152.4 cm (5 ft), so shorter heights are not accepted.
  • The formula was developed for adults aged 18 and over; children and adolescents are assessed with age- and sex-specific growth percentiles.
  • The formulas ignore muscle mass, frame size, age and ethnicity; they may not give a suitable target for athletes, older adults or pregnant women.
  • Ideal-weight formulas come from clinical practice, not from large representative population studies; the result is not a personal target weight recommendation.
  • The result is an estimate, not a medical diagnosis or treatment advice; consult your physician or dietitian for decisions about your health.

Calculator

Personal details

Sex

The formulas use different constants for men and women.

Enter your height in centimetres. The formulas are defined for heights of 152.4 cm (5 ft) and above.

After the first calculation, the result updates automatically when you change a value.

Result

Enter the values and press Calculate to see the result here.

About this tool

Ideal body weight is a reference weight estimated from height and sex. The four common formulas, developed in clinical practice (for example for drug dosing), start from a base weight at 5 ft (152.4 cm) and add a fixed amount for every inch (2.54 cm) above it.

Formulas (x = height (cm) ÷ 2.54 − 60, the inches above 5 ft)

  • Devine (1974): men 50 + 2.3·x; women 45.5 + 2.3·x
  • Robinson (1983): men 52 + 1.9·x; women 49 + 1.7·x
  • Miller (1983): men 56.2 + 1.41·x; women 53.1 + 1.36·x
  • Hamwi (1964): men 48 + 2.7·x; women 45.5 + 2.2·x

The calculator also gives the arithmetic mean of the four results and the healthy weight range for your height under the WHO BMI classification (BMI 18.5–24.9 → 18.5·height² to 24.9·height²). The formulas give a single value, whereas the BMI range shows a wide healthy zone.

Example: for a man 180 cm tall, x = 180 ÷ 2.54 − 60 = 10.87 inches. Devine gives 75.0 kg, Robinson 72.6 kg, Miller 71.5 kg, Hamwi 77.3 kg and the average is 74.1 kg; the BMI-based healthy range is 59.9–80.7 kg.

How to use

  1. Select your sex.
  2. Enter your height in centimetres (at least 152.4 cm).
  3. Press Calculate.

Notes

All results are in kilograms, rounded to 1 decimal place (HALF_UP). The average is computed from the unrounded formula results. 1 inch = 2.54 cm.

Sources

References

  1. [1]
    The Origin of the "Ideal" Body Weight EquationsPai MP, Paloucek FP, Ann Pharmacother, 2000
  2. [2]
    Obesity and overweight (WHO fact sheet)WHO

Frequently asked questions

4 questions

  1. None is definitive. Devine and Robinson are the most used in clinical practice; the average of all four together with the BMI-based healthy range gives a more balanced picture.

Next step

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