${0:calculate ${1:10}px in % with a ${2:16}px base|
ruby -e "n = (ENV['TM_TABSTOP_1'].to_f / ENV['TM_TABSTOP_2'].to_f)*100; n = n%1==0 ? n.to_i : n; print n.to_s + '%'"}

A snippet pipe that will calculate % based on a given pixel value and base unit. 

E.g. If you want a 10px font-size expressed as a percentage, you would need to perform the following calculation (note 16px is the default base font size in all browsers):

    10px / 16px = 0.625em * 100 = 62.5%

This snippet allows you to specify the desired pixel size and the base font size and will return the calculated % value.

Calculate % from pixels (snippet pipe)

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