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Ideal Body Weight Calculator

Estimate ideal body weight from height using the Devine formula.

Height

FORMULA45.5 + 2.3 × (inches over 60)

The Devine formula is least reliable for heights under 5 feet. Some medications dose on actual or adjusted weight instead.

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Quick reference

What this calculator is for

Estimates ideal body weight from height and sex using the Devine formula.

Commonly used for

Weight-based dosing reference
Ventilator tidal-volume estimates
Nutrition planning

Keep in mind

IBW is an estimate. Some medications dose on actual or adjusted body weight instead — confirm which weight the order intends.

Education & reference only

Always verify calculations and clinical decisions with institutional protocols and qualified clinical judgment.

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