Nursing Medication Calculator

Calculate medication doses accurately based on patient weight

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Calculator

General Calculator
Specific Medications
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Dosage Calculation Formulas

Total Dose Formula

To calculate the required medication dose:

Dose = Weight ร— Dosage

Where:

  • Weight โ€” Patient's weight in kg or lb
  • Dosage โ€” Prescribed amount in mg/kg (found on medication packaging or prescription)
  • Dose โ€” Total amount of medication needed

Liquid Medication Formula

For medicines in liquid form, calculate how many mL to administer:

Liquid dose (mL) = Dose (mg) รท Concentration (mg/mL)

Where:

  • Concentration โ€” Amount of active substance per volume (typically mg/mL)

This calculation is essential for:

  • Giving liquid medications to children
  • Hospital settings where drugs are administered intravenously
  • Any situation requiring precise mg to mL conversion
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