Estimate the size for the DB

HI,
We want to move the databases from old server "sql 2000" to the new server "sql 2008", we want to estimate the data files size and the log files for the next 2_3 years
anyone know the procedure or steps to achive this issus?
i need very urggent answer
thanks alot

try this...might help you...SELECT s.database_name, m
.physical_device_name, cast
(s.backup_size/1000000 as varchar(14))+' '+'MB' as bkSize, CAST
(DATEDIFF(second,s.backup_start_date , s.backup_finish_date)AS VARCHAR(4))+' '+'Seconds' TimeTaken,s
.backup_start_date, CASE
s.[type] WHEN
'D' THEN 'Full'WHEN
'I' THEN 'Differential'WHEN
'L' THEN 'Transaction Log'END as BackupType, s
.server_name, s
.recovery_modelFROM
msdb.dbo.backupset s inner
join msdb.dbo.backupmediafamily mON
s.media_set_id = m.media_set_idWHERE
DATEPART(WEEKDAY, backup_start_date) = 2 and backup_start_date > '2010-06-02' and type = 'D'ORDER
BY database_name, backup_start_date, backup_finish_date

you can modify your backup_start_date > '2010-06-02
from which date you want to analyse the backup growth.
As well if want to see only full backup then comment rest backup type.