CP1 file format description

Many people share .cp1 files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .cp1 file can be edited, converted or printed with. On this page, we try to provide assistance for handling .cp1 files.

2 filename extension(s) found in our database.

.cp1 - CARE-S InfoWorks Phosphorus Detail Data

The CP1 data files are related to CARE-S. The CP1 file is a CARE-S InfoWorks Phosphorus Detail Data. Computer-Aided Rehabilitation Program for Sewers (CARE-S) is a software program that supports efficiency in rehabilitation decisions.

Data files
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CARE-S InfoWorks Phosphorus Detail Data related extensions:
CARE-S InfoWorks User Defined Pollutant Detail Data
CARE-S InfoWorks Defined Pollutant Detail Data
CARE-S InfoWorks Biochemical Oxygen Detail Data
CARE-S InfoWorks Chemical Oxygen Detail Data
CARE-S InfoWorks Kjeldahl Nitrogen Detail Data
CARE-S InfoWorks Catchment Runoff Data

.ck1 - ChessBase Tactics Key Data

The CK1 game data files are related to ChessBase. The CK1 file is a ChessBase Tactics Key Data. ChessBase is a personal, stand-alone chess database.

Game Data files
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ChessBase Tactics Key Data related extensions:
ChessBase Annotations
ChessBase Search Booster
ChessBase Commentators Index
ChessBase Hash File of Doubles Data
ChessBase Team Index
ChessBase Old Game Database

Naturally, other applications may also use the .cp1 file extension. Even harmful programs can create .cp1 files. Be especially cautious with .cp1 files coming from an unknown source!

Can't open a .cp1 file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .cp1 file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

c1, c1p, cl1, cp, cpl, cpq, cpw, dp1, fp1, p1, pc1, sp1, xp1

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

Control Panel Item
CorelDraw Color Palette
GP-Pro EX Library
TINA Complex Parameter List
Tekla Structures Contour Plate Properties
Stalker Data

Operating systems

DataTypes.net currently supports the following operating systems:

Windows XP/Vista, Windows 7/8/10, Windows 11, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, macOS, Mac OS X, iOS, Android

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DataTypes.net >> CP1 file