Here’s my script that estimates when a running backup will finish …
--backup_status.sql SELECT r.session_id,r.command,CONVERT(NUMERIC(6,2),r.percent_complete) AS [Percent Complete], CONVERT(VARCHAR(20),DATEADD(ms,r.estimated_completion_time,GetDate()),20) AS [ETA Completion Time], CONVERT(NUMERIC(10,2),r.total_elapsed_time/1000.0/60.0) AS [Elapsed Min], CONVERT(NUMERIC(10,2),r.estimated_completion_time/1000.0/60.0) AS [ETA Min], CONVERT(NUMERIC(10,2),r.estimated_completion_time/1000.0/60.0/60.0) AS [ETA Hours], CONVERT(VARCHAR(1000),(SELECT SUBSTRING(text,r.statement_start_offset/2, CASE WHEN r.statement_end_offset = -1 THEN 1000 ELSE (r.statement_end_offset-r.statement_start_offset)/2 END) FROM sys.dm_exec_sql_text(sql_handle))) [CommandText] FROM sys.dm_exec_requests r WHERE r.session_id > 50 --AND command IN ('RESTORE DATABASE','BACKUP DATABASE', 'KILLED/ROLLBACK') --AND CONVERT(NUMERIC(6,2),r.percent_complete) > 0