How to convert a SVG to a PNG with ImageMagick?

Question

I have a SVG file that has a defined size of 16x16. When I use ImageMagick's convert program to convert it into a PNG, then I get a 16x16 pixel PNG which is way too small:

convert test.svg test.png

I need to specify the pixel size of the output PNG. -size parameter seems to be ignored, -scale parameter scales the PNG after it has been converted to PNG. The best result up to now I got by using the -density parameter:

convert -density 1200 test.svg test.png

But I'm not satisfied, because I want to specify the output size in pixels without doing math to calculate the density value. So I want to do something like this:

convert -setTheOutputSizeOfThePng 1024x1024 test.svg test.png

So what is the magic parameter I have to use here?

Answer 1

I haven't been able to get good results from ImageMagick in this instance, but Inkscape does a nice job of it on Linux and Windows:

inkscape -z -w 1024 -h 1024 input.svg -e output.png

Edit (May 2020): Inkscape 1.0 users, please note that the command line arguments have changed:

inkscape -w 1024 -h 1024 input.svg --export-filename output.png

(on macOS, you may need to use --export-file instead of --export-filename).

Here's the result of scaling a 16x16 SVG to a 200x200 PNG using this command:

Just for reference, my Inkscape version (on Ubuntu 12.04) is:

Inkscape 0.48.3.1 r9886 (Mar 29 2012)

and on Windows 7, it is:

Inkscape 0.48.4 r9939 (Dec 17 2012)