RT Calculator

Respiratory Therapy Clinical Calculations

IBW & Tidal Volume Calculator

IBW Calculator

Example: 175 cm (5'9"), 180 cm (5'11")

IBW Formulas (Devine Formula):
Male: 50 kg + 2.3 kg × (inches over 5 feet)
Female: 45.5 kg + 2.3 kg × (inches over 5 feet)
Or using cm: Male: 50 + 0.91 × (cm - 152.4) | Female: 45.5 + 0.91 × (cm - 152.4)

Tidal Volume Calculation

Use the IBW calculator above or enter manually