The amount of songs that will fit into a 16 gigabyte iPod Touch will vary depending on the quality, length and file format of each song. According to EveryiPod.com, a 16 gigabyte iPod will hold around 3,500 songs.
Songs that are longer will take up more space, meaning fewer songs will fit on the iPod. Higher quality songs will sound better, but will also take up more space. According to FileCatalyst.com, the average MP3-format song is about 3.5 megabytes. Since 16 gigabytes is equal to roughly 16,000 megabytes, a 16 gigabyte iPod Touch will hold more than 4,571 songs at this size.