how many pennies weigh an ounce
There are a lot of different pennies in the world, but 11.34 US pennies minted since 1982 will weigh one ounce. It would only take 9.145 older pennies.. Next time, try googling... Source(s): http://wiki.answers.com/Q/One_ounce_equals_how_many_pennies. Ryoma Echizen Â· 9 years ago.