About the pediatric epinephrine dose calculator
This calculator applies the standard weight-based epinephrine dosing formula used in pediatric emergency care: 0.01 mg per kilogram of body weight. The same 0.01 mg/kg formula underlies both intramuscular dosing for anaphylaxis and intravenous or intraosseous dosing for cardiac arrest, but the two routes use different drug concentrations and different maximum single-dose caps, so the calculated dose and draw volume can differ between them. This tool is intended for education and reference only.
How the dose is calculated
The calculator converts the entered weight to kilograms, then multiplies by 0.01 mg/kg to get the raw weight-based dose. For the intramuscular anaphylaxis route, that dose is capped at 0.3 mg for patients under 30 kg and 0.5 mg for patients at or above 30 kg, and it is drawn from the 1:1000 concentration (1 mg/mL), so the volume in mL equals the dose in mg. For the intravenous or intraosseous cardiac arrest route, the dose is capped at 1 mg per dose and is drawn from the more dilute 1:10,000 concentration (0.1 mg/mL), so the volume in mL equals ten times the dose in mg.
Interpreting the result
- The dose cap matters most for larger children and adolescents: once the weight-based dose reaches the route's maximum, the calculator reports the capped value rather than a higher raw number.
- Fixed-dose autoinjectors approximate the intramuscular weight-based dose in two steps: 0.15 mg for roughly 15-30 kg and 0.3 mg for roughly 30 kg and above. The calculated milligram dose helps confirm which device size matches a given weight.
- Confirming the concentration before drawing up a dose is essential - the 1:1000 and 1:10,000 solutions differ tenfold, and mixing them up is a recognized source of dosing error.
Important disclaimer
This tool performs standard weight-based arithmetic only. It does not constitute medical advice, does not replace institutional protocols or resuscitation guidelines, and should not be used to administer medication without the involvement of a licensed clinician.