---
title: "Calc Server"
slug: "calc-server"
updated: 2024-02-05T14:04:49Z
published: 2024-02-05T14:04:49Z
canonical: "kb.dataparc.com/calc-server"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://kb.dataparc.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Calc Server

PARCcalc Server generates calculated tag values. The calculations are defined in [PARCcalc Config](/v1/docs/parccalc-config). These must be saved to database to be active at the server level. If data must be backfilled, [Calcs Convert Importer](/v1/docs/calcs-convert-importer) is used to import historical data into the historian. PARCcalc Server performs the calculations and sends the data to a [PortIO](/v1/docs/parcserver-portio) configured to read in PARCcalc Server files. A separate PortIO instance is required for CTCcalcs. PortIO sends the files to PARChistory to be historized and then is available for use in PARCview and other applications.

![](https://cdn.document360.io/59db2ca4-e512-446a-a143-a7c626447812/Images/Documentation/image013_004.png)