Is there a limit to how many times I can convert traditional IRA to Roth IRA?

I recently had a 401K rollover done into my traditional IRA. I then converted that amount into my Roth IRA last week. Upon checking my traditional IRA today, I see that the money had gained some interest in my traditional IRA before I converted it. Am I allowed to convert this money to my Roth IRA without any penalties?

 

Thank you.