SQL DBA - Quick TempDB Summary

SELECT SUM(user_object_reserved_page_count) * 8.192 AS [UserObjectsKB] ,

SUM(internal_object_reserved_page_count) * 8.192 AS [InternalObjectsKB] ,

SUM(version_store_reserved_page_count) * 8.192 AS [VersonStoreKB] ,

SUM(unallocated_extent_page_count) * 8.192 AS [FreeSpaceKB]

FROM sys.dm_db_file_space_usage ;