Oxygen Flow Rate Calculator

Free calculate oxygen flow rate and FiO2. This is an educational tool only - always consult a healthcare provider.

Oxygen Settings

Results

Enter flow rate to calculate FiO2

About FiO2

  • • Room air: 21% (0.21)
  • • Nasal cannula: ~24-44% (1-6 L/min)
  • • Simple mask: ~40-60% (5-10 L/min)
  • • Venturi mask: Precise FiO2 (24-60%)
  • • Non-rebreather: ~60-90% (10-15 L/min)