How to estimate the size of dump file

Hi,
I would like to export my full database.
My database size is nearly 50G.
How to know how much space the export dump will occupy?
Thanks,
Kavitha

SELECT SUM(AVG_ROW_LEN * NUM_ROWS) FROM DBA_TABLES;
you should then add an 10-20% to the result due to the definitions in the export file.
Source:Paul M. @ Re: estimating size of a .dmp file
HTH
Girish Sharma

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