The cooking time and temperature for ham depend on whether it is pre-cooked or uncooked, bone-in or boneless, and its weight. The internal temperature of the ham is also important for food safety. Here are some general guidelines for cooking ham:

Pre-Cooked and Bone-In Ham:

• If the ham is a half ham weighing between five to seven pounds, it should heat at 325°F for 22-25 minutes per pound. If it is a whole ham weighing between 10 to 14 pounds, heat the ham at 325°F for 18-20 minutes per pound. The internal temperature should be 140°F.
• For ham labeled “fully cooked” or “ready to eat,” place the ham on a rack in a shallow roasting pan and bake uncovered until the internal temperature reaches 140°F. The cooking time is 15–18 minutes per pound for a 10–15-lb. ham and 18–24 minutes per pound for a 5–7-lb. ham.

Uncooked and Bone-In Ham:

• A half ham weighing between five and eight pounds requires 35 to 40 minutes of roasting at 325°F per pound. For whole bone-in hams weighing 12 and 16 pounds, cook the ham at 325°F for 22 to 26 minutes per pound. The internal temperature should be 145°F.
• For ham labeled “cook before eating,” place the ham on a rack in a shallow roasting pan and bake uncovered until the internal temperature reaches 160°F. The cooking time is 18–20 minutes per pound for a 10–15-lb. ham, 20 minutes per pound for a 5–7-lb. ham, or 35 minutes per pound for a 3–4-lb. shank or butt portion.

Pre-Cooked and Boneless Ham:

• This ham should weigh between six and 12 pounds. Heat at 325°F for 15-24 minutes per pound. The internal temperature should be 140°F.

Uncooked and Boneless Ham:

• Depending on the cut, this ham can weigh anywhere between two and eight pounds. For the Shoulder Roll cut, the ham will weigh between two and four pounds and should cook at 325°F for 35 to 40 minutes per pound. The boneless ham shoulder will be larger, weighing between five to eight pounds, and requires 30-35 minutes of roasting at 325°F per pound. The internal temperature should be 145°F.

It is important to use a food thermometer to check the internal temperature of the ham for food safety. For all types of ham, the minimum internal temperature should be 140°F for pre-cooked ham and 145°F for uncooked ham.