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INP NAS
File conversion

Convert INP to NAS

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Is it possible to convert INP to NAS?
Yes - INP converts to NAS.

Cross-FEA mesh exchange (Abaqus .inp <-> Nastran .nas/.bdf) is the meaningful conversion: a preprocessor like Hypermesh, ANSA or FEMAP imports the Abaqus deck and re-exports it in Nastran format (and vice versa). Keyword/card mapping isn't perfect, so check materials and boundary conditions after translation.

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Tested on macOS, Windows & Linux
Last verified Oct 2026

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How to convert INP to NAS

Converting a .INP file to .NAS lets you open the content in software that prefers the .NAS format, though some details may change compared with the original. We are still putting together the list of programs that handle .INP files.

A full step-by-step guide for this conversion is on the way; the information above is drawn straight from our database.

About these formats

.INP Abaqus Input File (analysis input deck)

An INP file is an Abaqus input deck - a plain-text file that defines a finite-element model (mesh, materials, loads, boundary conditions, analysis steps) for the Abaqus solver. Open it in…

Open .INP details →
.NAS Nasal Script

A .NAS file is associated with Nasal Script, a developer file.

Open .NAS details →