12 calculators
Mechanical Ventilation
Ideal Body Weight (IBW)
Devine formula
Predicted Body Weight (PBW)
ARDSNet formula
Tidal Volume
4–8 mL/kg of PBW
Desired Tidal Volume (VT)
From PBW & target mL/kg
Desired Respiratory Rate (RR)
Adjust ventilation to target PaCO₂
Desired Minute Ventilation (VE)
VE vs Desired PaCO₂
Desired FiO₂
Target PaO₂ adjustment
RSBI
Rapid Shallow Breathing Index
P/F Ratio
PaO₂ / FiO₂
I:E Ratio, Ti and Te
From RR and Ti
Airway Resistance (Raw)
Constant-flow ventilation
Lung Compliance
Static & Dynamic
5 calculators
ABG & Acid Base
ABG Interpreter
pH / PaCO₂ / HCO₃⁻
Anion Gap
Na⁺ − (Cl⁻ + HCO₃⁻)
A–a Gradient
At sea level, room air assumptions
Winter's Formula (Metabolic Acidosis)
Expected respiratory compensation
Winter's Formula (Metabolic Alkalosis)
Expected respiratory compensation
6 calculators
Oxygen Therapy
FiO₂ Estimator
Approximate delivered FiO₂
O₂ Cylinder Duration
Oxygen therapy or mechanical ventilation
ROX Index
HFNC success prediction
HACOR Score
NIV failure risk at 1 h
iNO Flow Calculator
INOmax delivery
Oxygenation Index (OI)
Neonatal / pediatric severity
5 calculators
Neonatal & Pediatric
APGAR Score
Newborn assessment
ETT Size (Pediatric)
Cole formula, age >1y
Neonatal ETT Depth
Weight-based (NRP)
Pediatric ETT Depth
Oral & Nasal
Adult ETT Depth
Oral & Nasal