Ham for 25 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 | 9 lb (1/3 lb each) | 7 lb (1/4 lb each) |
| High end: ham is the main dish | 13 lb (1/2 lb each) | 9 lb (1/3 lb each) |
| Generous: with leftovers | 19 lb | 13 lb |
Adding children
Children count as half a portion at the high USDA serving.
| Guests | Bone-in | Boneless |
|---|---|---|
| 25 adults | 13 lb | 9 lb |
| 25 adults and 2 children | 13 lb | 9 lb |
| 25 adults and 4 children | 14 lb | 9 lb |
| 25 adults and 6 children | 14 lb | 10 lb |
Reheating a ham for 25
Fully cooked hams at 325°F to 140°F. The USDA timetable lists each kind for a range of weights; for 25 guests the plan is a 13 lb whole bone-in ham.
| Kind of ham | For 25 | USDA chart weights | Time at 325°F |
|---|---|---|---|
| Cooked, whole, bone-in | 13 lb | 10 to 14 lb | 3 h 15 min to 3 h 54 min |
| Cooked, half, bone-in | 13 lb | 5 to 7 lb (outside: check the label) | 3 h 54 min to 5 h 12 min |
| Cooked, spiral-cut (whole or half) | 13 lb | 7 to 9 lb (outside: check the label) | 2 h 10 min to 3 h 54 min |
| Cooked, boneless (vacuum packed) | 9 lb | 6 to 12 lb | 1 h 30 min to 2 h 15 min |
Twenty-five guests: ham beside the turkey
Big holiday tables often serve ham as a second meat. Counted at the low USDA serving of 1/3 lb, 25 guests need 9 lb of bone-in ham; as the only meat, 13 lb, a whole ham.
A whole 13 lb ham reheats in 3 h 15 min to 3 h 54 min at 325°F, the same oven temperature as a turkey, so both can share the oven if they fit. The Thanksgiving timeline for 20 people times a ham alongside two turkeys.
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 13 lb ham is on the label for this size.
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 25 people?
13 lb of bone-in ham at 1/2 lb a person, the high end of the USDA range, or 9 lb at the low end of 1/3 lb if there are plenty of other dishes.
How much boneless ham for 25 people?
7 to 9 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 25 people?
For a 13 lb whole bone-in ham, 3 h 15 min to 3 h 54 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.