Adjusted Body Weight Calculator

Calculate Devine ideal body weight (IBW), adjusted body weight (AdjBW), and percent of IBW for dosing-oriented scenarios.

ImperialMetric

Sex

Height

5 ft 10 in

Actual Body Weight

235 lbs

146

% of IBW

High Above IBW

Substantially above IBW reference. Dose strategy should follow medication-specific guidance.

Devine IBW

160.9 lbs

Actual / IBW

146%

Adjusted Body Weight

190.6 lbs

Suggested Dosing Weight

190.6 lbs

At >=120% IBW, this tool surfaces AdjBW as the common default for dosing calculations.

80100120140160200

<100%100-120%120-140%140-160%160%+

High Above IBW

Actual Weight Relative to IBW

AdjBW is often considered when actual body weight is at or above 120% of ideal body weight.

RANGE	CATEGORY	WHAT IT USUALLY MEANS
0-100	Below IBW Actual body weight is below ideal body weight reference.	Actual body weight is below ideal body weight reference.
100-120	Near IBW Actual body weight is within roughly 100-120% of IBW.	Actual body weight is within roughly 100-120% of IBW.
120-140	AdjBW Commonly Used In many dosing protocols, adjusted body weight is considered from >=120% of IBW.	In many dosing protocols, adjusted body weight is considered from >=120% of IBW.
140-160	High Above IBW Substantially above IBW reference. Dose strategy should follow medication-specific guidance.	Substantially above IBW reference. Dose strategy should follow medication-specific guidance.
160+	Very High Above IBW Large divergence from IBW reference. Use clinician or protocol-driven dosing pathways.	Large divergence from IBW reference. Use clinician or protocol-driven dosing pathways.

Formula Used

This calculator uses:

IBW (Devine) = 50 + 2.3 x (height in - 60) for men

IBW (Devine) = 45.5 + 2.3 x (height in - 60) for women

AdjBW = IBW + 0.4 x (Actual BW - IBW)

Many hospital dosing workflows apply AdjBW when actual body weight is at or above 120% of IBW, though medication-specific protocols can differ.

Use With Caution

This calculator is educational and does not replace medication-specific clinical guidance. Drug properties, renal function, age, and diagnosis can change the appropriate dosing weight method.

For non-dosing weight planning, use the Ideal Weight Calculator and Weight Loss Calculator.

To set intake from maintenance energy, pair with the TDEE Calculator and Calorie Deficit Calculator.

References

Stanford antimicrobial obesity dosing guide (Devine + AdjBW usage):Stanford Obesity Dosing Guide
Review of ideal body weight formula history and use:Variability in IBW Formulae (PMC)

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