Hot answers tagged measurements
There is a feature request for metric units here https://forums.loseit.com/posts/list/60/178.page which is active since 2009. So according to the forum thread, as of writing this answer,metric units are not available for Lose it! yet.
Due to recent changes, the measuring system in Google Docs is now affected by your Google Account default language, not any more by the document language as indicated in @Dominik's answer. So: Go to myaccount.google.com/language. You can also reach it via the gear icon on the Google Drive or Google Docs main pages. Set the language to "English – United ...
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