numc
For Linux & GNOME

A notepad that
does the math.

Write down your thinking. numc calculates each line as you type, keeping your notes and results together.

Get startedExplore the source
Native GTK & AdwaitaOrdinary text filesGPL-3.0-or-later
The numc application: light appearance on the left and dark appearance on the right, with expressions and aligned results.
One workspace. Your preferred appearance.
More than arithmetic

Small notes. Useful answers.

Speak in units

Convert distances, temperatures, durations, data sizes and compound units without leaving your document.

5 km in miles

Put numbers in context

Use percentages, variables, custom functions and daily reference exchange rates for estimates and everyday plans.

tip = 15% of bill

Keep your work close

Tabs, pinned documents, templates and find and replace help you return to the things you calculate often.

Ctrl+D · duplicate a line
Your files, your workflow

Simple text.
Nothing to unlock.

Your documents are ordinary text files you can read, move and synchronize with your own tools. Save when you are ready; unsaved drafts stay in memory, closing prompts protect edits, and external changes get an explicit choice.

Documents are never uploaded. Only exchange-rate updates contact the provider. Offline mode works with cached and document-local rates.

Read the expression reference ↗
Get started

Made for your desktop.

Build the Flatpak package from the source repository, then install and run it. The development guide lists the required tools.

Build instructions ↗Project releases ↗
From the repository directory
make flatpak
flatpak install --user dist/numc.flatpak
flatpak run io.gitlab.rez.numc