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Liquid Dose Calculator

This calculator helps determine the correct liquid medication dose based on the ordered dose, standard dose, and standard dosage unit. It’s useful for healthcare professionals, pharmacists, and caregivers to ensure accurate administration of liquid medicines. Just enter the ordered and standard values, and the calculator will compute the required liquid volume.

Liquid Dose Medicine

Input Fields
OD
mg
SD
If enabled, the result will update automatically when you change any value.

Liquid Dose Calculation Formula

Formula
$$\text{Liquid Dose} = \left( \frac{\text{Ordered Dose (OD)}}{\text{Standard Dose (SD)}} \right) \times \text{Standard Dosage Unit (SDU)}$$

Explanation:

  • Ordered Dose (OD): the amount of medicine prescribed (e.g., 250 mg)
  • Standard Dose (SD): the amount of medicine contained in the available liquid (e.g., 500 mg)
  • Standard Dosage Unit (SDU): the volume of the liquid containing the SD (e.g., 5 mL)

The formula gives the exact volume (in mL) to administer.


This calculator is commonly used when converting prescribed dosages into actual liquid volumes, especially in pediatric and elderly care. By entering the prescribed dose, the standard concentration of the medication, and the volume it comes in, users can avoid underdosing or overdosing. It simplifies medical math for oral syrups and other liquid medications and is vital for safe dosing at home or in clinical settings.

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