Medication Calculator

Before using the Medication Calculator


  • Obtain an accurate weight for the individual receiving medication.
  • Read and follow all instructions and warnings on the medication label.
  • Triple check the medication concentration (mg per ml) to ensure it matches the calculator's concentrations.
  • If you are questioning anything don't give the medication, instead call  OnCall RN!


Why a Medication Calculator?


Medical providers typically utilize weight-based dosing to ensure patients receive adequate but not excessive doses of medications. We see this most commonly in pediatric patients. Our Medication Calculator is intended to be a resource to provide accurate weight-based dosing in the home setting. On their labels, OTC pediatric fever reducing medications typically suggest using weight base dosing when possible. This is because weight-based dosing allows for a much more accurate dose for the individual as compared to age base dosing (the dosing graph typically found on children's medications).


  • How can OnCall RN help parents in Southeastern PA choose the right over-the-counter medication dose for children?

    OnCall RN supports families across Southeastern PA—including Schwenksville, Collegeville, Pottstown, Phoenixville, and surrounding Montgomery County communities— by offering an easy-to-use Child Dosage Calculator with evidence-based dosing guidance. Our nurse-led team helps parents confidently determine safe acetaminophen, ibuprofen, and OTC medication doses using their child’s age, weight, and symptoms.

  • What acute symptoms or conditions can the Child Dosage Calculator help parents manage in Schwenksville and surrounding Southeastern PA communities?

    The Child Dosage Calculator helps parents in Schwenksville, Collegeville, Royersford, Limerick, and greater Southeastern PA determine safe over-the-counter medication dosing for common acute childhood conditions. This includes fever, cold and flu symptoms, sore throat, headaches, minor pain, teething discomfort, and mild inflammation. With nurse-approved acetaminophen and ibuprofen dosing guidance, families can confidently manage sudden symptoms at home.

  • What should parents in Southeastern PA do if their child has an allergic reaction or medication emergency?

    If your child shows signs of an allergic reaction—such as hives, swelling, vomiting, trouble breathing, or sudden worsening symptoms—parents in Schwenksville, Collegeville, Royersford, and surrounding Southeastern PA communities should seek immediate medical care. Call 911 for severe reactions or breathing issues. For non-life-threatening concerns, OnCall RN’s licensed nurses can provide urgent telehealth guidance, help you assess symptoms, and advise on the next safest steps. Safety always comes first—when in doubt, get emergency help right away.