The Dosage Rate calculator computes the amount of a drug to be administered in intervals based on a set amount of time to administer a total amount of drug.
INSTRUCTIONS: Choose units and enter the following:
- (D) Drug amount
- (T) Time span for administration of drug amount
- (I) Interval duration
Dosage per Interval (DpI): The calculator returns the amount of drug to be administered per interval to
The Math / Science
The formula for the dosage per interval is:
DpI = D * (T/I)
where:
- DpI = Dosage per Interval
- D = Total Drug Amount to be administered over the time span (T).
- T = Time span for total drug amount
- I = Interval duration
Example: A doctor needs a patient to have a 400 milligrams of a heart medicine over the next two days. The nurse is directed to administer the drug ever four hours. How much should the dosage be?
DpI = D * (T/I) = 400mg * (2 days / 4 hours) =
