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Pediatric quick reference

Weight-based drug doses and airway sizing from age and weight. Airway sizes come from age; drug doses and the mask size come from weight.

years

Decimals allowed for months, e.g. 0.5

kg
Enter an age from 0 to 16 years to see airway sizing.
Enter a weight to see weight-based drug doses.

Formula

  • Uncuffed ETT (mm) = age / 4 + 4; cuffed ETT (mm) = age / 4 + 3.5
  • Oral tube depth at lip (cm) = 3 x cuffed tube size
  • LMA size by weight; drug doses are weight-based and capped

Source

  • Doses per standard pediatric anesthesia references (e.g. Cote's A Practice of Anesthesia for Infants and Children); ranges simplified to common starting doses.

Clinical reference only. Verify independently; clinical judgment governs.