The currency converter is very easy to use. It is a classic converter.You can exchange currencies from US Dollar to Nigerian Naira and vice versa. USD / NGN. Value pair USDNGN.Allows you to perform basic, simple and easy calculations and operations such as addition, subtraction, multiplication and division.The currency converter is free.It uses the exchange rates of Open Exchange Rates. The exchange rate is updated every hour.If there is no internet connection, the exchange rate of the last connection is used.Historical exchange rate charts.