Change default measure from imperial to metric in Spreadsheet

I recently upgraded LibreOffice to ver., and wish to change the default units of measurement from Imperial to Metric - but all responses keep referring me to Tools/Option in order to do this - but my version of LibreOffice Spreadsheet does not include this option under Tools - can you help, any assistance would be greatly appreciated

Are you perchance a Mac user? If so, LibreOffice | Preferences is the menu you need; or keyboard shortcut Command+Comma.

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Yes I am a Mac user & the info was in LibreOffice/Calc/General/Metrics & thereby it also updated Spreadsheet - thanks heaps

Thus it is useful to mention your OS and LO version when asking a question.

yes indeed I will in future thanks again