The conversion rate of a 150-dollar Amazon gift card to the Nigerian naira can vary depending on several factors. Exchange rates are constantly fluctuating in the global currency market.

To determine how much it is worth in naira today, one would need to check the current exchange rate. Financial institutions and currency exchange platforms provide up-to-date rates. These rates are influenced by economic conditions, such as inflation, interest rates, and the overall stability of the Nigerian and international economies.
It's important to note that when converting, there may also be fees associated with the exchange process. Different platforms might have different fee structures, which can affect the final amount of naira received for the 150-dollar gift card. So, it's advisable to compare rates and fees from multiple sources to get the best conversion deal.