The conversion of a $30 Amazon gift card to Nigerian Naira depends on the current exchange rate. Exchange rates are constantly fluctuating in the global currency market.

To determine the exact amount, one would need to check a reliable financial source or a currency exchange platform at the specific time of conversion. For example, if the exchange rate is 1 US dollar equals 410 Nigerian Naira, then a $30 gift card would be equivalent to 30 multiplied by 410, which is 12,300 Naira.
However, as mentioned earlier, the exchange rate can change. It could be affected by various factors such as economic conditions, central bank policies, and international market trends. So, to get the most accurate and up-to-date conversion, it's advisable to look for the latest exchange rate information before making the calculation.