How long does it take a 5 lb chicken to be done at 450?

A 5-pound chicken typically takes about 1 to 1.5 hours to cook at 450°F. It's important to check the internal temperature; the chicken is done when it reaches 165°F in the thickest part of the breast and thigh. Using a meat thermometer ensures safe cooking. Let it rest for about 10-15 minutes before carving to retain juices.