Low Flow Oxygen FiO2 Calculator


Respiratory rate: breaths/min  
Gas flow:  ml/Min

Blender Oxygen:

Actual Inspired O2:  

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 (which must be in mL per minute NOT litres), and percent O2 at the blender.

The algorithm uses a method validated by Finer et al, Pediatric Pulmonology 1996;21(1):48-51. I have modified Finer’s formula to allow for the use of an O2 blender.  A tidal volume of 5.5mL/kg is assumed.

Page developer: NotesDeveloperNZ@hotmail.com

Concept: Michael Hewson

Copyright © 2003 Capital & Coast District Health Board, All rights reserved.

Script provided by:
Dr Michael Hewson
Consultant Neonatologist
Wellington Hospital
Pte Bag 7902
Wellington South
New Zealand

Created 6/11/2003 / Last modified 6/11/2003
Neonatology on the Web / webmaster@neonatology.org