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Ideal Body Weight Calculator

Ideal Body Weight (IBW) is a clinical measure used to estimate the optimal weight for an individual based on their height and gender. IBW provides a specific target weight commonly used in medical settings for medication dosing, nutritional assessments, and health evaluations.

Ideal Body Weight Calculator

Enter your details below to find your ideal body weight

ft

in

Ideal Body Weight

0

lbs (-- kg)

Healthy range (±10%)

--

About the Ideal Body Weight Calculator

What is Ideal Body Weight?

Ideal Body Weight (IBW) is a clinical estimate — not a personal goal — used by healthcare providers for tasks like medication dosing and nutritional assessments. It gives a single reference weight based only on height and biological sex.

Because IBW doesn't account for muscle mass, frame size, or body composition, most people's healthy weight actually spans a range around it rather than one exact number.

How is Ideal Body Weight calculated?

This calculator uses the Devine formula, the most widely used IBW equation in clinical settings. It starts from a base weight at 5 feet tall and adds a fixed amount for every inch above that.

Formula (Devine)

Men: 50 kg + 2.3 kg per inch over 5 ft

Women: 45.5 kg + 2.3 kg per inch over 5 ft

Example: Woman, 5’5" → 45.5 + 2.3 × 5 ≈ 57 kg (≈ 126 lb)

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