Adult ETT Depth (Lip Corner)
Estimates where an adult oral endotracheal tube should sit at the corner of the mouth, by sex and by height.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Sex
- Female
- Height
- 160 cm
Result: Starting depth at the corner of the mouth: 19 cm by height (height / 5 - 13, Cherng 2002); 21 cm by sex (women, Roberts 1995).
The tool opens with these values already filled in. Replace them with your own.
What you enter
- Sex
- Height
How this is calculated
Citation
Roberts JR et al. Proper depth placement of oral endotracheal tubes in adults prior to radiographic confirmation. Acad Emerg Med. 1995;2(1):20-24. Cherng CH et al. Airway length in adults. J Clin Anesth. 2002;14(4):271-274. Read the sources: Roberts 1995 ↗, Cherng 2002 ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.