Dosage Calc Questions and Answers Updated 2026

Dosage Calc
Questions and
Answers Updated
2026
determiningBgtt/minB-dropBfactorB-BAnswer
BconvertBgivenBhoursBtoBminutes=B1hr/60min=xhrs/xmin

volume(mL)/minutesBxBdropBfactor(gtt/min)=BxBgtt/min



1.5BLBtoBinfuseBoverB16Bhours.BDropBfactorBisB20Bgtt/min.BShouldBbeBsetBtoBdeliverB
howBmanyBgtt/min?BRoundBtoBnearestBwholeBnumberB-BAnswer
B1500mL/B360Bmin.BxB20Bgtt/min=B83



OneBgrainBisBequalBtoB-BAnswer
B60Bmilligrams,BthereforeBaBgrainBisBaBmoreBpowerfulBdoseBthanBaBmilligram



1BgramB(Gm)B=B?BmgB-BAnswer B1000mg



1BmilligramB(mg)B=?BmcgB-BAnswer B1000mcg



1BliterB(L)B=B?BmlB-BAnswer B1000ml



1BgrainB(gr)B=B?mg.Bgr1/4=?mg.Bgriii=?mgB-BAnswer B60mg.B15mg.B180mg.



1BteaspoonB(tsp)B=B?mlB-BAnswer B5ml

, 1BtablespoonB(Tbsp.)B=B?mlB-BAnswer B15ml



1BounceB(oz.)B=B?mlB-BAnswer B30Bml



1BkgB=B?lbsB-BAnswer B2.2lbs



TheBbasicBformulaBforBdosageBcalculationsBis:B-BAnswer
BD/HB×BVB=BamountBtoBgive.BAllBmustBbeBinBsameBunitBsystem.

DB(desiredBdose):BtheBdoseBordered

HB(on-handBdose;BsuppliedBdose):BdoseBonBlabelBofBcontainer

VB(vehicle):BformBandBamountBofBsuppliedBdrug.



OrderedBdose:BErythromycinB500mgBbyBmouthBeveryB8Bhours

SuppliedBdose:BErythromycinB250mg

Vehicle:B1BtabletB-BAnswer B250B×B1B=B2Btablets



Ratio-ProportionBFormulaB-BAnswer
BDoseBonBhand/QuantityBonBhandB=DoseBdesiredB/XB(quantityBdesired).BCrossBmultipl
yBandBsolveBforBx.BAllBmustBbeBinBsameBunitBsystemB.BCalculatingBforBtheBquantityB
ofBsuppliedBmedicationBthatBisBequalBtoBtheBprescribedBdosage



DoseBonBhandB(suppliedBdose):BErythromycinB250Bmg

QuantityBonBhand:B1Btablet

DesiredBdoseB(orderedBdose):BErythromycinB500BmgB-BAnswer
B250Bmg/1BtabletB=B500Bmg/XBtablet.BByBcrossBmultiplyingBandBsolvingBforBX,ByouBh
ave

250XB=B500

XB=B2Btablets