Ham Cooking Time Calculator

What this does

So you have a ham to cook for the holiday table and you need to know how long to put it in for, so the timing fits around everything else. This calculator gives you an estimate. Tell it the type of ham, the cut, and the weight, and it works out a recommended oven time, along with the oven temperature to set.

How to use it

1. Choose the ham type, from smoked cook-before-eating to fully cooked, fresh, or country ham.
2. Pick the cut, then enter the weight in pounds.
3. Press Calculate to see the recommended time and oven temperature.

How the maths works

Roasting time scales with weight, at a rate that depends on the type and cut of ham:

cooking time = weight × minutes per pound

So a 10 pound whole, bone-in, cook-before-eating ham at about 19 minutes per pound works out to roughly 190 minutes, a little over three hours, in an oven set to 325°F. One thing to keep in mind: boneless and rolled cuts take a bit longer per pound than bone-in ones, because the heat has to work its way through solid meat rather than travelling along the bone.

The temperature that actually matters

This is the important part, so read it before you rely on the clock. The cooking time is only a planning estimate. What actually tells you the ham is done, and safe, is its internal temperature, measured with a food thermometer in the thickest part, away from bone.

The safe targets from the USDA are clear. Fresh ham and cook-before-eating ham should reach an internal temperature of 145°F, then rest for at least 3 minutes before carving. A fully cooked ham can be eaten cold, but if you are reheating one that was sealed at a USDA-inspected plant, bring it to 140°F, and bring any other cooked ham, including leftovers or one repackaged elsewhere, to 165°F. Throughout, keep the oven set no lower than 325°F. And always read the package, because some hams that look ready to eat are not, and the label will tell you which you have.

Planning tips

Treat the time as a guide and give yourself a buffer, since real cooking time shifts with your particular oven, the shape of the ham, and how cold it was going in, so letting it sit out of the fridge for a short while before roasting helps it cook more evenly. Covering the ham with foil keeps it from drying out, especially the leaner cuts. And country hams are their own thing, often needing soaking and special preparation, so follow the instructions that came with yours.

Questions people ask

References

1. USDA Food Safety and Inspection Service. Hams and Food Safety. https://www.fsis.usda.gov/food-safety/safe-food-handling-and-preparation/meat-catfish/hams-and-food-safety