https://github.com/zserge/kalk

Modern VisiCalc clone for the terminal
https://github.com/zserge/kalk

Last synced: 12 days ago
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Modern VisiCalc clone for the terminal

• Host: GitHub
• URL: https://github.com/zserge/kalk
• Owner: zserge
• License: mit
• Created: 2026-03-15T17:03:31.000Z (3 months ago)
• Default Branch: main
• Last Pushed: 2026-03-15T18:27:15.000Z (3 months ago)
• Last Synced: 2026-03-16T06:33:00.639Z (3 months ago)
• Language: C
• Size: 207 KB
• Stars: 1
• Watchers: 0
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# kalk

![screenshot](kalk.png)

A minimal spreadsheet for the terminal. Single C file, no dependencies

beyond ncurses.

	$ kalk budget.csv

Inspired by VisiCalc and mostly compatible with it. Reads and writes CSV.

Supports formulas with cell references, basic functions, cell formatting,

row/column operations, and frozen titles.

## Build

	make

	make install        # installs to /usr/local

	make install PREFIX=/usr

Requires a C99 compiler and ncurses.

## Usage

Arrow keys navigate. Type a number or formula to enter data. Formulas

start with `+`, `-`, `(`, or `@`. Anything else is a label.

Press `/` for commands:

	/B          Blank cell

	/C          Clear sheet

	/DR /DC     Delete row/column

	/IR /IC     Insert row/column

	/F_         Format cell (L R I G D $ % *)

	/GC         Set column width

	/GF_        Set global format

	/M          Move row/column (arrow keys to drag)

	/R          Replicate (copy with relative refs)

	/SL /SS     Load/Save CSV

	/SQ         Save and quit

	/TV/TH/TB/TN  Lock title rows/columns

	/Q          Quit

Other keys:

	>           Go to cell (type reference)

	!           Force recalculation

	"           Enter label

	Backspace   Clear cell

	Tab         Next column

	Enter       Next row

	Home        Jump to A1

	Ctrl-C      Quit

## Formulas

Arithmetic: `+A1*B2-3`, `(A1+A2)/2`

Functions: `@SUM(A1...A10)`, `@ABS(x)`, `@INT(x)`, `@SQRT(x)`

Cell references adjust automatically on replicate, insert, and delete.

Use `$` for absolute references: `$A$1` (fixed), `$A1` (fixed column),

`A$1` (fixed row).

## License

MIT