I want to tune cell width and height in "pixel" (Self-translated from Japanese topic)

Hello, I’m a beginner of LibreOffice, previously used Microsoft Office 365.
I want to ask one thing, what I’m feeleng unconfortable, moving from Microsoft Excel to LibreOffice calc.
(This is self-translation of This Topic , and Japanese version is the most accurate, due to my translation ability. )

Is there any way to set cell width and height in pixel in LibreOffice Calc?
It seems that pixel does not exist in metrics, used in LibreOffice Calc.
In Excel, I could set very clear cell height-width ratio (e.g. half, one-third, etc.), but in LibreOffice, I cannot tune cell height-width ratio as I want.
(I should translate from mm or point to pixel, and frequently, this does not work properly)

If you know anything about it, please tell me.
If this pixel-metrics does not exist in LibreOffice, I want somebody to make this metrics.
Thank you.

Have a search at “twips”:
https://ask.libreoffice.org/search?q=twips%20%23english