Oral ETT Insertion Depth for Children
Insertion Length (oral) · Equipment
Notes
- PB 1 kg: 7 cm (Preterm birth)
- PB 2 kg: 8 cm (Preterm birth)
- NB 3 kg: 9 cm
- Baby 5 kg: 10 cm
- Baby 7 kg: 11 cm
- Baby 9 kg: 12 cm
- >1 year: Insertion length (oral) = 12 + years/2
Insertion Length (oral): value for each weight | Weight | Age (estimate) | Value |
| 2 kg | preterm | 8 cm 8 centimeters |
| 3 kg | newborn | 9 cm 9 centimeters |
| 4 kg | 1 mo | 9.5 cm 9.5 centimeters |
| 5 kg | 2 mo | 10 cm 10 centimeters |
| 6 kg | 4 mo | 10.5 cm 10.5 centimeters |
| 7 kg | 6 mo | 11 cm 11 centimeters |
| 8 kg | 8 mo | 11.5 cm 11.5 centimeters |
| 9 kg | 10 mo | 12 cm 12 centimeters |
| 10 kg | 1 y | 12.5 cm 12.5 centimeters |
| 11 kg | 1 y 6 mo | 12.5 cm 12.5 centimeters |
| 12 kg | 2 y | 13 cm 13 centimeters |
| 13 kg | 2 y 4 mo | 13 cm 13 centimeters |
| 14 kg | 2 y 8 mo | 13 cm 13 centimeters |
| 15 kg | 3 y | 13.5 cm 13.5 centimeters |
| 16 kg | 3 y 6 mo | 13.5 cm 13.5 centimeters |
| 17 kg | 4 y | 14 cm 14 centimeters |
| 18 kg | 4 y 6 mo | 14 cm 14 centimeters |
| 19 kg | 5 y | 14.5 cm 14.5 centimeters |
| 20 kg | 5 y 6 mo | 14.5 cm 14.5 centimeters |
| 21 kg | 6 y | 15 cm 15 centimeters |
| 22 kg | 6 y 4 mo | 15 cm 15 centimeters |
| 23 kg | 6 y 8 mo | 15 cm 15 centimeters |
| 24 kg | 7 y | 15.5 cm 15.5 centimeters |
| 25 kg | 7 y 4 mo | 15.5 cm 15.5 centimeters |
| 26 kg | 7 y 8 mo | 15.5 cm 15.5 centimeters |
| 27 kg | 8 y | 16 cm 16 centimeters |
| 28 kg | 8 y 4 mo | 16 cm 16 centimeters |
| 29 kg | 8 y 8 mo | 16 cm 16 centimeters |
| 30 kg | 9 y | 16.5 cm 16.5 centimeters |
| 31 kg | 9 y 4 mo | 16.5 cm 16.5 centimeters |
| 32 kg | 9 y 8 mo | 16.5 cm 16.5 centimeters |
| 33 kg | 10 y | 17 cm 17 centimeters |
| 34 kg | 10 y 3 mo | 17 cm 17 centimeters |
| 35 kg | 10 y 6 mo | 17 cm 17 centimeters |
| 36 kg | 10 y 9 mo | 17 cm 17 centimeters |
| 37 kg | 11 y | 17.5 cm 17.5 centimeters |
| 38 kg | 11 y 4 mo | 17.5 cm 17.5 centimeters |
| 39 kg | 11 y 8 mo | 17.5 cm 17.5 centimeters |
| 40 kg | 12 y | 18 cm 18 centimeters |
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Values imported unchanged on 2026-11-04. Independent verification against official sources is in progress (see Methodology).
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