Low Flow Oxygen FiO2 Calculator


Page developer: http://nicutools.org with modifications by Dr Michael Hewson, NICU, Wellington Hospital
Clinical Guidelines Back Newborn Services Home Page
  • Use this calculator to estimate the effective FiO2 that low flow oxygen delivers.



Respiratory rate:


Gas flow:


Blender Oxygen:


Actual Inspired O2:

  • Simply input the child's weight (in kg), his or her respiratory rate, the current O2 flow rate and percent O2 at the blender.
  • The algorithm uses a method validated by Finer et al, Pediatr Pulmonol 1996;21(1):48-51.  Finerís formula has been modified to allow for the use of an O2 blender. A tidal volume of 5.5mL/kg is assumed.


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