Low Flow Oxygen Calculator

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  • Use this calculator to estimate the effective FiO2 that low flow oxygen delivers

  • 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.  Finer’s formula has been modified to allow for the use of an O2 blender. A tidal volume of 5.5mL/kg is assumed.




Respiratory rate:


Gas flow:


Blender Oxygen:


Actual Inspired O2: