Hi Naresh,
For tools you can check the blow options:
http://scn.sap.com/community/database/blog/2014/07/08/set-your-databases-free--with-exodus
http://www.ispirer.com/products/migrate-sql-server-to-sap-hana
But with my experience I will tell you its better to do manual conversion, reason for that is if you use the tool then amount of time you spend to test the procedures will be more than a manual conversion .And by code walk through manual conversion you also have an opportunity to optimize the code for HANA.
you can also check the post to get more insights...
Thanks & Regards
A.DInesh