TPN Osmolarity Calculator

To use the TPN osmolarity calculator:

Select the base solutions.
Enter the volume of each base solution.
Click the Calculate button to determine the total base volume.
Enter the amount of each additive per Bag. Please note the units of measure.
Click the Calculate button to determine the final osmolarity.
To start over again, click the Clear button.


Base solution
Amino acid		ml
Dextrose		ml
Lipid		ml
Sterile Water		ml

Total volume		ml

Additives (per Bag)
Ca Cl		mEq
Ca Gluconate		mEq

K Cl		mEq
K Acetate		mEq
K Phosphate		mMol

Mg Sulfate		mEq

Na Cl		mEq
Na Acetate		mEq
Na Phosphate		mMol

MVI-12^#		ml
MTE-4^#		ml

Osmolarity		mOsmol / L

^#In a central TPN the contribution of MVI and MTE to the total mOsmol is minimal, therefore they are usually excluded in the calculation. With a peripheral PN solution, these components become more important.

Alternate method
I gave my TPN osmolarity calculator idea and code to Dave at GlobalRPh, he changed it around a bit. If you compound your TPN base using grams, his calculator may be more useful:

Global RPh Osomlarity Calculator

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