UOM Conversion in Sales Cycle

In erpnext, is it possibe to sell item in one UOM but the stock is in other UOM? E.g. sell item in gr but deduct the stock in kg…

Currently its not available. Please create a git issue.

You can also try making a stock entry to convert units, but you will have to maintain separate item codes for both the units + make that extra conversion entry.
Ref : https://discuss.erpnext.com/t/how-can-i-define-an-alternate-selling-unit-for-an-item/2348/6