ETT Size Calculator
Result
ETT Size Calculator (Pediatric) The ETT Size Calculator estimates the endotracheal tube size and insertion depth for a child from age, using standard formulas. For clinical education only. — free online calculator.
Formula
- ETT Size Calculator calculates its result from Age. It uses the formula Uncuffed ID = age/4 + 4; Cuffed ID = age/4 + 3.5; Depth = age/4 + 12. Change any input to recalculate the result instantly. This is an informational calculation and is not medical advice.
- The main inputs are Age. Enter them in the units and format shown in the calculator.
- Use the measurement units shown beside each field. The result is an estimate and should be interpreted in context.
- Changing any input above recalculates the result with the same calculation engine used by this page.
Example: ETT Size
- Age: 4
Using Age = 4, the calculated result is 13.
Sample result: Calculating…
Frequently asked questions
What does the ETT Size calculate?
ETT Size Calculator (Pediatric) The ETT Size Calculator estimates the endotracheal tube size and insertion depth for a child from age, using standard formulas. For clinical education only. — free online calculator.
Which values should I enter?
Enter Age using the units and format shown beside each field.
What formula does this calculator use?
The calculator uses the following relationship: Uncuffed ID = age/4 + 4; Cuffed ID = age/4 + 3.5; Depth = age/4 + 12.
Why might my result differ from another source?
Results can differ because measurement methods, rounding and assumptions vary. This calculator is an estimate and is not a medical diagnosis.
Does the result update automatically?
Yes. Changing an input updates the result using the same calculation engine shown on this page.