How Long do You Cook a Chicken Per Pound?

How long it takes to cook a chicken depends on how large the chicken. A small 2 1/2 to 3 lb. chicken will take 1 1/4 hours in a 375 degree oven. A little larger 4 1/2 to 5 lb. chicken will take 1 1/2 to 2 hours. A large 5 to 6 lb. roaster will take up to 2 to 2 1/2 hours at a lower 325 degree oven. Make sure that the internal temperature reaches 165 degrees.