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In a Google Docs document, I would like to be able to specify the page margins (File → Page Setup) in millimeters instead of inches.

Is it possible to switch between imperial and metric units?

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2 Answers 2

up vote 8 down vote accepted

Go to Settings → Document Settings on the top right of the page and change the language to English (UK).

Rulers and margins will now both be in centimetres (cm).

You may need to log out and sign back in before you see the changes take effect.

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Changing language works but one should know that only new documents are affected. –  user17159 Feb 7 '12 at 9:10
I guess the setting is now located under "File" > "Language", or am I wrong? –  grunwald2.0 Feb 2 at 14:14
Google should really decouple the preferences system. I live in Denmark so I measure my using the metric system and use DKK as currency, but I still want my interface to be in US English. –  Jan Aagaard Feb 24 at 10:01

This is not possible in the current version of Google Docs with "English (US)" regional settings. Until they change this you can convert millimeters to inches using this Google query:

<n>mm in inches

Or you could follow the tips in Dominiks answer, and change your language settings to "English (UK)".

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