In addition to Jobin's comment, in case you're also interested in checking at steps to perform the migration yourself, you may refer to https://www.atlassian.com/git/tutorials/migrating-overview/ which is a guide step-by-step to perform the migration.
If you're using Bitbucket Server for hosting your Git repositories, then SVN Mirror add-on for Bitbucket is the best way to migrate your SVN projects:
In case you're not going to use Bitbucket Server, take a look at SubGit which is command-line tool (SVN Mirror add-on relies on SubGit to provide import and mirror functionality).
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