What is default unit of memory in RES memory in HTOP command

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I need this info to convert the memory usage into MB

RES : How much physical RAM the process is using, measured in kilobytes.

you said no need of conversion
what about the values we need to enter in benchmark file? :

Average memory taken during Upload of 1GB file: MB
Average memory taken during Download of 1GB file: MB
Any increase in memory taken by QBox Server after each upload: MB
Any increase in memory taken by QBox Server after each download: MB

Try this then.