Import and Export .leaf Files

Export when the calculation has to exist as a file. An attachment for someone outside your account, a copy in the project folder, or an archive of the issued revision.

Export and Import ▾ sit in the File group on the Home tab. Both have an icon on the Quick Access bar.

Export ▾ writes a Calculeaf .leaf file, or a Mathcad Prime .mcdx / Mathcad 15 .xmcd file. The .leaf holds the whole worksheet — every region with its content and its last answer, plus pictures, unit system, page theme, and the header and footer. Mathcad export spends AI tokens.
Import ▾ offers Calculeaf (.leaf), Mathcad Prime (.mcdx), and Mathcad 15 (.xmcd). The Quick Access icon skips the menu and goes straight to the .leaf file picker.

The Home File group with Export and Import. — File group. Export ▾ downloads a .leaf or a Mathcad file; Import ▾ opens one as a new sheet.

Export a .leaf

Choose Export ▾ → Calculeaf (.leaf) on Home → File. The Quick Access icon skips the menu and downloads the .leaf.
Calculeaf saves any pending edits first. If a region cannot be saved it stops and reports: Could not save all regions — fix errors, then export again.
The browser downloads a .leaf named after the worksheet.

The file carries no share link and no worksheet identity, so importing it produces a genuinely separate sheet rather than a second window onto the original. Open it later with Import ▾ → Calculeaf (.leaf). Import always creates a new worksheet and never overwrites the sheet you have open. Hand a file that is not a Calculeaf export to the same command and you get: Import failed — use a Calculeaf (.leaf) export.

Export to Mathcad

Export ▾ → Mathcad Prime (.mcdx) or Mathcad 15 (.xmcd) asks the AI to rewrite each equation into that program's math markup, then downloads a file you can open there. Text and pictures come across. Plots, tables, frames, and diagrams are written as a note so you can rebuild them. An equation the model cannot represent is kept as text, and the page tells you which one. A free account is required, and the call spends AI tokens. A sheet with no equations does not.

Importing from Mathcad

A .mcdx or .xmcd arrives as a new sheet in the same way, but it is a conversion rather than an open. Run Evaluate and walk the page from the top. Names, units, and Given/solve blocks are the usual things to put right by hand. Mathcad import sets out what to expect. Once it computes, either keep working in the account copy or export a .leaf of your own.

Next, read what survives a Mathcad import before you trust the converted sheet.