Ham for 12 people by serving size
The USDA allows 1/3 to 1/2 lb of bone-in ham a person, or 1/4 to 1/3 lb of boneless, because the bone is weight you buy but do not eat. Pounds are rounded up.
| Serving | Bone-in ham | Boneless ham |
|---|---|---|
| Low end: with several other dishes | 4 lb (1/3 lb each) | 3 lb (1/4 lb each) |
| High end: ham is the main dish | 6 lb (1/2 lb each) | 4 lb (1/3 lb each) |
| Generous: with leftovers | 9 lb | 6 lb |
Adding children
Children count as half a portion at the high USDA serving.
| Guests | Bone-in | Boneless |
|---|---|---|
| 12 adults | 6 lb | 4 lb |
| 12 adults and 2 children | 7 lb | 5 lb |
| 12 adults and 4 children | 7 lb | 5 lb |
| 12 adults and 6 children | 8 lb | 5 lb |
Reheating a ham for 12
Fully cooked hams at 325°F to 140°F. The USDA timetable lists each kind for a range of weights; for 12 guests the plan is a 6 lb half bone-in ham.
| Kind of ham | For 12 | USDA chart weights | Time at 325°F |
|---|---|---|---|
| Cooked, whole, bone-in | 6 lb | 10 to 14 lb (outside: check the label) | 1 h 30 min to 1 h 48 min |
| Cooked, half, bone-in | 6 lb | 5 to 7 lb | 1 h 48 min to 2 h 24 min |
| Cooked, spiral-cut (whole or half) | 6 lb | 7 to 9 lb (outside: check the label) | 1 h to 1 h 48 min |
| Cooked, boneless (vacuum packed) | 4 lb | 6 to 12 lb (outside: check the label) | 40 min to 1 h |
Twelve guests: half ham or spiral-cut
6 lb of bone-in ham is inside the USDA half ham chart, 1 h 48 min to 2 h 24 min at 18 to 24 minutes a pound. A spiral-cut ham is charted from 7 lb at 10 to 18 minutes a pound, so a 7 lb spiral ham takes 1 h 10 min to 2 h 6 min.
The spiral ham is already sliced, which makes serving twelve quicker. Wrap it in heavy foil to reheat so the slices stay moist, and allow the extra 1 lb as leftovers.
Use the ham size calculator for your own guest list, and read how much ham per person and how long to cook a ham. How long to cook a 6 lb ham has the times for every kind.
Want to change anything else? The calculator above is the full Ham Size Calculator: How Big a Ham, Bone-In or Boneless: edit any number and the results update instantly.
Tools & materials for this project
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Frequently asked questions
How much ham for 12 people?
6 lb of bone-in ham at 1/2 lb a person, the high end of the USDA range, or 4 lb at the low end of 1/3 lb if there are plenty of other dishes.
How much boneless ham for 12 people?
3 to 4 lb, at 1/4 to 1/3 lb a person. Boneless ham needs less weight because there is no bone.
How long does it take to reheat a ham for 12 people?
For a 6 lb half bone-in ham, 1 h 48 min to 2 h 24 min at 325°F, until it reaches 140°F. A fully cooked ham is also safe to serve cold.
Related sizes and guides
Estimates only. Results assume standard materials and simple shapes. Supplier products vary, and the final call on quantity, structure and safety is yours. Check your local code and your supplier's guidance before ordering.