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Online Calculator to Help Estimate your PERT Dosage


Written by: CDHF

Updated: June 14th, 2023

Pancreatic enzymes help digest fat, protein and carbohydrates in the food you eat. Without enough pancreatic enzymes, the foods you eat won’t be fully digested and you won’t absorb all the nutrients and calories available from them.  

This malabsorption can be caused by diseases that affect the pancreas such as pancreatitis, pancreatic enzyme insufficiency, cystic fibrosis, cancer of the pancreas, or surgeries that involve the pancreas.  These conditions block the release or reduce the number of digestive enzymes produced by the pancreas. 

Pancreatic enzyme replacement therapy, or PERT, is the use of medications to help you digest and absorb the nutrients in your foods and to reduce the problems associated with malabsorption. 

PERTs are unlike other medications because the dose must be adjusted to your level of enzyme insufficiency.  This can be confusing and time-consuming.  Fortunately, there is now a simple online calculator to help you estimate your PERT dosage.

We are very excited to have collaborated with Craig’s Cause – Pancreatic Cancer Society to bring you the Digest This! Online Calculator.

How it Works

The calculator will calculate your maximum recommended PERT dosage per day using your weight and enzyme prescription as inputs in the Patient Profile section. This information will need to be entered each time since many people with PEI will have frequent weight and/or prescription changes.

Next, you will be prompted to enter the food & beverage items you are consuming for each meal.

Finally, our app will analyze the lipase units required to optimize your digestion and will calculate a custom PERT dosage based on your specific prescription.


Please complete the form by clicking the button below to register for the PERT dosage calculator. The calculator can be used on laptop, desktop, tablet or smartphone. Once you have submitted the form, you will receive an email with a direct link to the calculator.

The information provided through this tool is intended solely as general information for educational purposes only. It is not intended to replace the advice and care of your doctor, nor is it intended to be used for medical diagnosis or treatment. Should you have any questions regarding your treatment or condition, always consult your doctor or another healthcare professional.

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