---
name: "mag"
section: "1"
platform: "linux"
package: "texlive-doc"
version: "2026.1-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/mag"
---

# mag(1)

computes TeX fontsizes and magsteps

## NAME

mag - computes TeX fontsizes and magsteps

## SYNOPSIS

**mag** \[-**R***dpi\] magstep . . .*

**mag** *\[-***r***\] \[-***R***dpi\] fontsize . . .*

## DESCRIPTION

*delim $$* *This tool calculates fontsizes given magsteps.  TeXfonts are provided as* *true sized fonts or as magnifications.  The fontsize of a true sized* *font equals the resolution of the printer (ex.  300).  The fontsize* *of a font magnified $n$ magsteps equals:* *1.2 sup{n} times 300* *delim off* *rounded to its nearest integer value.  Fontnames for TeX fonts normally* *consists of the name (cmr), pointsize (10), type (pk)* *and fontsize (360), for example: cmr10.360pk.*

## EXAMPLES

*The result of mag -R240 -2 0 0.5 1 will be:*

```
167 240 263 288

```

The inverse function is computed with the *-r* option. The result of *mag -r -R240 167 240 263 288* will be the fontsteps:

```
-2 0 0.5 1

```

The UNIX shells allow command substitution. One can write:

```
mag -r -R240 `mag -R240 -2 0 0.5 1`

```

## DATE

18 December, 1989

## AUTHOR

```
Piet Tutelaers
University of Technology Eindhoven
Maintained in TeX Live; please send bug reports or other correspondence
to tex-k@tug.org (http://lists.tug.org/tex-k).
```