How does the FreeStyle Libre 2 system calculate an insulin dose?

The insulin calculator utilises settings entered into the insulin calculator during one of two setup modes (Easy or Advanced); this feature requires an understanding of the use of insulin and must be set up by a healthcare professional. Using the settings they enter, the glucose reading from the built-in blood glucose meter and carbohydrate information (in grams or servings) the user provides, the insulin calculator software in the Reader calculates a suggested insulin dose.
The calculator is only for use with finger prick blood glucose results from the built-in meter. Your patients can't use the insulin calculator with sensor glucose reading.