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    0.1.2 • Public • Published


    Quickly convert math equations into beautiful SVGs (or PNGs/MathML). A port of the Ruby Mathematical for Node.js.

    Build Status



    npm install mathematical


    The simplest way to do this is

    Mathematical = require 'mathematical'
    new Mathematical.render(string_with_math)

    string_with_math should just be a string of math TeX inline ($..$) or display ($$..$$) style math.

    The output will be a hash, with keys that depend on the format you want:

    • If you asked for an SVG, you'll get:
      • width: the width of the resulting image
      • height: the height of the resulting image
      • svg: the actual string of SVG
    • If you asked for a PNG, you'll get:
      • width: the width of the resulting image
      • height: the height of the resulting image
      • png: the PNG data
    • If you asked for MathML, you'll get:
      • mathml: the MathML data


    new Mathematical takes an optional object to define a few options:

    • ppi - A double determining the pixels per inch of the resulting SVG (default: 72.0).
    • zoom - A double determining the zoom level of the resulting SVG (default: 1.0).
    • base64 - A boolean determining whether Mathematical's output should be a base64-encoded SVG string (default: false).
    • maxsize - A numeral indicating the MAXSIZE the output string can be. (default: unsigned long).
    • format - A string indicating whether you want an "svg", "png", or "mathml" output. (default: svg).

    Pass these in like this:

    opts = { ppi: 200.0, zoom: 5.0, base64: true }
    renderer = new Mathematical(opts)
    renderer.render('$a \ne b$')


    Before building this gem, you must install the following programs and libraries:

    • glib-2.0
    • gdk-pixbuf-2.0
    • xml2
    • cairo
    • pango
    • libffi
    • ruby
    • bison

    You will also need fonts for cmr10, cmmi10, cmex10, and cmsy10.

    Mac install

    To install these dependencies on a Mac, everything can be installed via Homebrew:

    brew install glib gdk-pixbuf cairo pango libffi

    Install the fonts with:

    cd ~/Library/Fonts
    curl -LO \
         -LO \
         -LO \
         -LO \
         -LO \
         -LO \
         -LO \
         -LO \

    xml2 should already be on your machine.

    *nix install

    To install these dependencies on a *nix machine, fetch the packages through your package manager. For example:

    sudo apt-get -qq -y install libglib2.0-dev libxml2-dev libcairo2-dev libpango1.0-dev libffi ttf-lyx libgdk-pixbuf2.0-dev

    Windows install

    On a Windows machine, I have no idea. Pull requests welcome!


    After cloning the repo:

    grunt test

    If there were no errors, you're done! Otherwise, make sure to follow the dependency instructions.


    npm i mathematical

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    • gjtorikian