Nursing Math Formulas

Formulas Used In Nursing

Celsius and Fahrenheit Temperature

Fahrenheit to Celsius

To convert Fahrenheit to Celsius , substract 32 and divide the result by 1.8.

C = ( F- 32)/ 1.8
Where C is Celsius and F Fahrenheit

Celsius to Fahrenheit

To convert Celsius to Fahrenheit , multiply by 1.8 and add 32.

F = ( 1.8 *C ) + 32
Where C is Celsius and F Fahrenheit

Kelvin to Fahrenheit and Celsius Conversion

Kelvin to Celsius

K – 273.15

Kelvin to Fahrenheit

F=(K – 273.15) * 1.8 + 32
Where K is Kelvin

SI UNIT OF Temperature:kelvin

Nursing Math Formulas

Formula for Calculation Medication Dosage.


Where D, ( desired ) is the dosage that the physician prescribed.
Where A, (available ) is the dosage strength as stated on the medication label.
Where Q ,( quantity ) is the volume or form in which the dosage strength is available ,such as tablets,capsules or milliliters.

Formulas For Intravenous Calculation .

Flow Rates

Drops per minute=(Total volume* Drop factor)/Time in minutes

Infusion Time

Infusion Time =(Total volume to infuse) / (Milliliters per hour being infused)

Number of milliliters per hour=(Total volume in milliliters)/Number of hours

DHA Model Question Paper and Answer

1) A client with COPD is admitted to the medical surgical unit. To help this client maintain a patent airway and achieve maximal gas exchange the nurse should

    a)instruct the client to drink 2L of fluid daily
    b)Maintain the client on bed rest
    c)Administer anxiolytics as prescribed ,to control anxiety
    d)Administer pain medication as prescribed

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Megha Baby

Hi Myself Megha Baby. An post Basic BSc nurse, Presently working as a Registered Nurse (RN) .The knowledge that I have acquired I would like to share here with you.

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