It depends on the date.
It's not easy to tell the 1982s apart, so to figure out how many cents weigh a pound (or any other amount) you'd have to decide which date range you wanted to use and eliminate all 1982 coins. A pound is 453.6 gm so just divide that by the weight of the penny date that you decided to use.
See Related Links, below, for a list of all current specifications for other U.S. coins
Read more, below about the various pennies.
A US current penny weighs 2.5 grams.
1000 pennies would weigh approximately 2.5 pounds.
A 1981 penny weighs 2.5 grams.
3.11 grams for pennies made from 1959 to 1982
A 2012 penny weighs about 2.5 grams.
A US current penny weighs 2.5 grams.
1000 pennies would weigh approximately 2.5 pounds.
A 1981 penny weighs 2.5 grams.
The weight depends on the year, as there was a change in the metal composition in 1982. Pennies minted after that weigh 2.5 grams. Older ones weigh 3.11 grams.
3.11 grams for pennies made from 1959 to 1982
A 2012 penny weighs about 2.5 grams.
US Lincoln cents from 1909-1982 weigh 3.11 grams coins from 1983 to date weigh 2.5 grams
34 pounds
From 1983 to date all Lincoln cents weigh 2.50 grams.
A penny made of pure gold would weigh approximately 0.09 grams.
Copper pennies minted before 1982 weigh 3.11 grams.
A US penny weighs approximately 2.5 grams. So, 1 million dollars in pennies would weigh around 22,680 kilograms, or 50,000 pounds.