The conversion rate between the US dollar and the Nigerian naira fluctuates constantly. To determine how much a $500 Amazon gift card is in naira, one needs to check the current exchange rate.

Typically, this exchange rate is influenced by various economic factors such as inflation, interest rates, and market demand. Financial institutions and currency exchange platforms provide real-time rates.

So, to find out the exact amount in naira for a $500 Amazon gift card, it's advisable to look up the latest exchange rate on a reliable financial website or consult a local bank or currency exchange service. This will give the most accurate figure based on the prevailing market conditions.