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Ideal Weight Calculator

Compare the Devine, Robinson, Miller and Hamwi ideal weight formulas with the healthy BMI range for your height.

Result

Enter your values and select Calculate to see the result.

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How the Ideal Weight Calculator works

“Ideal weight” formulas were created to estimate medicine doses, not to set weight goals, and they disagree with each other. The calculator shows four well-known formulas side by side, together with the weight range for a healthy BMI (18.5–24.9) at your height — the range most health organizations use for adults.

Formulas

Devine (men)

50 kg + 2.3 kg × inches over 5 ft

Women: 45.5 kg + 2.3 kg per inch. Robinson, Miller and Hamwi use the same shape with different numbers.

Healthy BMI range

weight = BMI × height (m)², BMI 18.5 to 24.9

Examples

A man, 5 ft 10 in (177.8 cm)

Devine gives 73.0 kg, Robinson 71.0 kg, Miller 70.3 kg and Hamwi 75.0 kg. The healthy BMI range is about 58.5–78.7 kg.

Under 5 feet

The formulas subtract weight for each inch below 5 ft, which they weren't designed for — the BMI range is the better guide.

Frequently asked questions

Which formula is the best?

None is best for everyone. Devine is the most widely used in medicine; Robinson and Miller were later refinements. Treat the spread as a rough range.

Do these formulas account for muscle?

No. Athletes often weigh more than any formula suggests and are healthy.

Does age matter?

The formulas ignore age. Healthy weight ranges can differ for older adults and for children.

Information:

Good to know

For general information only — not medical advice, diagnosis or treatment. Talk to a doctor or other qualified professional about your health.

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