IV Dosage Calculation

The IV Dosage Calculator computes the dosage based on the prescribed dose and the concentration of drug on hand.

INSTRUCTIONS: Enter the following:

• (D) Desired Dose in Units
• (H) Units per Volume on Hand
• (V) Base Volume of Drug on Hand

IV Dosage (X): The calculator returns the push amount in millilitres (mL).  However this can be automatically converted to compatible units via the pull down menu.

The Math / Science

The IV Dosage Formula uses the desired dosage amount and amount of the drug on hand to calculate the amount of dosage that should be administered to a patient's IV.  The formula for IV Dosage is: 

   X =  D/H * V

Where:

• X = Amount to be administered 
• D = Desired dose
• H = Amount of drug on hand
• V = Volume of drug on hand

Example

A doctor prescribes 2,500 units of heparin via IV.  Heparin is available in concentration of 10,000 units per millilitre (10,000 u / 1 mL).  In this case, the desired dose (D) is 2,500, the Amount of Drug on hand (H) is 10,000, and Volume (V) is 1 mL. 

        X =  2,500/10,000 * 1mL = .25 mL

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