The conversion of a $15 Google Play Card to Naira depends on the current exchange rate. Exchange rates fluctuate constantly due to various economic factors such as inflation, interest rates, and geopolitical events.

To determine the exact amount in Naira, 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 dollar = 410 Naira, then a $15 Google Play Card would be worth 15 * 410 = 6150 Naira.
However, it's important to note that exchange rates can change rapidly. So, the amount in Naira could be different from one day to the next. It's advisable to keep an eye on the exchange rate trends to get the most accurate conversion when making such a calculation.