Ham Dinner Calculator
Enter the guest count and ham style. The calculator sizes the purchase, the oven hours at 325 F, when the glaze goes on, and the leftover tail you are actually buying.
Christmas ham math trips people on two things: bone-in hams waste bone (half a pound per person, not a third), and most hams are already cooked so the oven is only reheating to 140 F. Get both right and the centerpiece cannot fail - the glaze timing is the only real skill left.
How to use
- Head count of actual ham eaters - sides fill people more than you think.
- Bone-in half or boneless: the per-person math changes by half again.
- Read the oven hours and glaze window before the day, not during it.
Frequently asked questions
How much ham do I need per person?
Half a pound per person for bone-in (the bone and shrinkage eat the difference), a third of a pound for boneless - both already include the leftover tail for sandwiches and soup. Twelve guests means a 6 pound bone-in half or a 4 pound boneless.
How long do I cook a ham at 325 F?
Plan 18 minutes per pound for bone-in, 14 for boneless - but since most city hams are fully cooked, you are only reheating to 140 F internal, not cooking. A foil tent keeps spiral cuts from drying; the calculator converts your exact poundage.
When should I glaze the ham?
The last 30 to 45 minutes, after the foil comes off - any earlier and the sugars burn before the center warms. Brush, return uncovered, and let it rest 15 minutes before carving so the slices stay juicy.
Can I freeze leftover ham?
Yes - cooked ham holds a month frozen, which is why a buy-one-get-one December deal is a January meal rather than a dare. Dice before freezing and the soup and quiche tail gets even easier.