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## How do I calculate doses for Medications based on Body Surface Area (m2)?
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Modified on: Mon, 2 Mar, 2020 at 11:42 AM

#### You may be wondering how to calculate doses for medications that require surface area values such as chemotherapy drugs. SmartFlow is set up to calculate medications based on *mg/kg*, not by body surface area which is what the *m2 *dosage requires. There is a way to work around this so you can still use the medication on the flowsheets and have the drug calculation appear correct when added:

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#### 1. You will need to calculate the total dose for the patient manually.

#### 2. Enter the **Total dose** volume (i.e. the *0.48mL* as shown below), and the calculator will now give the **Dosage **calculation by working backwards:

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#### 3. Change the second value in the **Dosage **section to */patient*, */dog* or */cat*, etc.:

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#### 4. Now you get the correct **Total dose** (*mg*, *mL*), as well as the **Dosage** per patient. Choose how you want to have the medication displayed on the flowsheet by choosing **Dose**,** Total (mg)**, or **Total (mL)** option, and click **Done **to save changes.

*We hope you found this information useful!*

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