How many megabytes is a typical mp3 song?

it all depends on the bit rate and length of song.

bit rates can vary greatly.

usually from 64 to 192kbps (kilo bits per second) but can be as high as 1000

i ripped all my cds into my pc at 128kbps which is about average.

the higher the bitrate then better the quality but also the larger the file.

at 128 kbps it is roughly a minute a megabyte...

a 3 1/2 minute song is about 3.5 mb at 128kbps

same 3 1/2 minute song at 196kbps is 5 mb

i have over 8000 mp3s on my pc. some downloaded from internet with varying bit rates and some ripped from my cds and my average file size is about 4-5 mb