Pediatric Endotracheal Tube Size

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About this Calculator

Several formulas such as the ones below allow estimation of proper endotracheal tube size for children 1 to 10 years of age, based on the child's age:

  • Uncuffed endotracheal tube size (mm ID) = (age in years/4) + 4
  • Cuffed endotracheal tube size (mm ID) = (age in years/4) + 3


Pediatric Advanced Life Support

Circulation 2005;112;IV-167-IV-187; originally published online Nov 28, 2005;

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