Home > Calculator

# Calculator

## Body Weight

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.