Convert PRT to XLS

A spreadsheet is needed when a PRT file contains a bill of materials, report, measurements, or model parameters that must be edited, filtered, or shared without the original CAD application. The correct conversion depends on the program that created the file because PRT is an ambiguous extension, not one universal format.

What the PRT format is

PRT commonly identifies a proprietary CAD part file created by PTC Creo Parametric, Pro/ENGINEER, Siemens NX, and other engineering applications. These files can contain 3D geometry, features, materials, dimensions, assemblies, and custom parameters rather than spreadsheet cells. Other programs use .prt for text reports or application-specific data.

Check the source program, file association, and internal contents before selecting a conversion method. Renaming file.prt to file.xls changes only the filename; it does not convert the data.

What the XLS format is

.xls is the legacy Microsoft Excel workbook format used by Excel 97–2003 and supported by current Excel and other spreadsheet applications. It stores tables, formulas, formatting, charts, sorting, filtering, and basic reports.

Use XLS when the recipient or downstream system requires the older Excel format. Use .xlsx for new work when possible: it supports larger worksheets and newer Excel features.

How to convert a CAD PRT file

1. Open the file in the application that created it, preferably the matching version of PTC Creo, Siemens NX, or another native CAD system. Generic converters generally cannot interpret proprietary parametric features reliably.
2. Determine which values belong in the spreadsheet, such as part numbers, descriptions, materials, dimensions, custom parameters, quantities, or an assembly bill of materials.
3. Use the CAD application's parameter, BOM, table, or report function to export those values as .csv, tab-delimited text, or another supported tabular format. This exports selected metadata or a BOM, not the 3D model itself.
4. Open the exported file in Excel with Data → From Text/CSV. Select the correct delimiter and encoding, and assign suitable column types. Set part numbers and other identifiers to Text so leading zeroes are preserved.
5. Check units, quantities, duplicate component rows, dates, decimal separators, and empty fields against the source model.
6. Save the result with File → Save As and select Excel 97-2003 Workbook (*.xls). Review Excel's compatibility warning before confirming.

A CAD part has no meaningful one-to-one spreadsheet representation. If the requirement is to exchange its shape, use a CAD exchange format such as .step or .iges; use XLS for extracted metadata, measurements, reports, or BOM data.

How to convert a text-based PRT file

Make a backup and open a copy in a plain-text editor. Readable rows, delimiters, or consistently aligned fixed-width fields indicate that the file may be importable as tabular data.

1. In Excel, choose Data → From Text/CSV and select the PRT file. If it is not visible, change the file filter to show all files.
2. Choose the delimiter, or define fixed-width column breaks when the fields are aligned by character position.
3. Set the character encoding and inspect dates, decimal values, scientific notation, blank fields, and long identifiers. Prevent automatic conversion when it would alter the source values.
4. Save the worksheet through File → Save As as Excel 97-2003 Workbook (*.xls). LibreOffice Calc can import the text and save it as XLS through File → Save As.

Online conversion services

Services such as CloudConvert and Zamzar can be considered for a text-based PRT only when their current format lists explicitly support that exact input and produce XLS or a usable intermediate CSV. Support for proprietary Creo, NX, and other CAD PRT files is not universal, so verify the result with a sample file before processing a batch.

Do not upload confidential designs, customer data, or export-controlled CAD files unless the service's security, retention, and data-processing terms are acceptable. For proprietary CAD files, exporting a report or BOM from the native desktop application is usually the more reliable and controllable method.

Quality and compatibility limits

The spreadsheet contains only the fields selected during export. It does not preserve parametric features, sketches, constraints, assembly relationships, revision history, or 3D geometry. Verify units, coordinate conventions, quantity rollups, duplicate components, and revision-specific parameters against the source application.

Legacy XLS worksheets are limited to 65,536 rows and 256 columns. Choose .xlsx when the extracted data exceeds those limits or requires features unavailable in the legacy format.