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Asked: 2026-05-29T10:56:08+00:00

I am running some gnu time scripts which generates output of the form mm:ss.mm

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I am running some gnu time scripts which generates output of the form
mm:ss.mm (minutes, seconds and miliseconds, for example 1:20.66)
or hh:MM:ss (hours, minutes and seconds, for example 1:43:38).
I want to convert this to seconds (in order to compare them and plot them in a graphic).

Which is the easiest way to do this using bash?

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1 Answer

  1. Editorial Team

    Assuming you can run the GNU date command:

    date +'%s' -d "01:43:38.123"

    If the script is generating “mm:ss.mm” you’ll need to add “00:” to the beginning, or date will reject it.

    If you’re on a BSD system (including Mac OS X), you need to run date -j +'%s' "0143.38" unless you have GNU date installed with MacPorts or Homebrew or something.

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