Calculator

Formula

IBW
Estimated ideal body weight in (kg)
Males: IBW = 50 kg + 2.3 kg for each inch over 5 feet.
Females: IBW = 45.5 kg + 2.3 kg for each inch over 5 feet.

ABW
Estimated adjusted body weight in (kg)
If the actual body weight is greater than 30% of the calculated IBW, calculate the adjusted body weight (ABW):
ABW = IBW + 0.4 (actual weight - IBW)

The IBW and ABW are used to calculate medication dosages when the patient is obese.

This formula only applies to persons 60 inches (152 cm) or taller.