IF I convert a stock in a traditional IRA, that has a gain, to a Roth IRA, will that gain be considered taxable after the transfer? I know the value of the transfer is.

If the asset value of the stock / fund being converted to Roth from a non Roth account is say worth $2,000 and has a gain of $500, what will be the taxable amount of the conversion.....$2000 as income or $1500 income and cap gain of $500?
Thank you.