What is Calculeaf
Calculeaf is an engineering calculation worksheet. You put formulas, units, notes, and plots on a page. The working stays visible, the units stay on the numbers, and the answers update as you type.
Closer to Mathcad than to a spreadsheet
A spreadsheet hides the formula inside the cell. A Calculeaf sheet shows the
expression, the units, and the answer together on the page. You assign a name
with :=. You ask for an answer with =. Later
regions use that name. The page reads like a calculation note you can print,
check, and hand to someone else — the same idea as Mathcad or Creo's
calculation sheets.
If the work already exists in Mathcad, you do not have to retype it.
Calculeaf imports Mathcad Prime
.mcdx and Mathcad 15 .xmcd files from Home →
Import.
Where you can run it
- Web. Open calculeaf.com/app in a desktop browser. This is the full editor: ribbon, canvas, sidebars, sharing, teams, and AI. Everything in this section describes it.
- Desktop. A native Mac or Windows app. Worksheets sync to your account by default; you can switch to local storage from the account menu.
- Desktop (Local). The same editor, but worksheets never leave the machine. Choose this when a policy says the file must not be uploaded.
- Phone. A simpler list of regions at /mobile/, including an Ask AI flow that can take a photo from the camera. It needs a signed-in account.
What a worksheet contains
A worksheet is a named document with a unit system — SI, USCS, or CGS — and a stack of regions. Click empty paper once and type to add a math region. Double-click empty paper for a text region, such as a heading or a note.
Other region types cover plots, sweep tables, pictures, dropdown lists, sliders, and 2D or 3D frames. Evaluation walks the page in visual order: top to bottom, then left to right within a row. A name is available to everything below it.
Next, create an account if you want sheets to follow you between machines, or go straight to Your first worksheet and try it as a guest.