Ham (Fully Cooked, Bone-In)
cooking times
The answer
2 hr 30 min – 3 hrat 325°F
At the most common temperature, 325°F, a fully cooked bone-in ham runs about 2 hr 30 min – 3 hr at 10 lb. Pick your temperature below for the full chart. Done is always 140°F internal.
SOURCE·USDA FSIS safe minimum internal temperatures·ham (fully cooked, bone-in) row of the FSIS chart·REVIEWED JUL 2026
USDA safe zone — 140°F and above
Done is a temperature, not a time. Every figure on this page is a planning range; the green band is the only part that decides. For a fully cooked bone-in ham it opens at 140°F and a 15-minute rest.
Source—USDA Food Safety & Inspection Service safe minimum internal temperatures—retrieved 2026-07
How this is worked out
- Anchor. Start from what USDA FSIS publishes for a fully cooked bone-in ham — its safe minimum internal temperature of 140°F, and the FSIS roasting timetable where one exists for this cut.
- Rate. Convert the anchor into a planning rate at 325°F: 15–18 min/lb, cross-checked against at least three independently published sources.
- Scale. Multiply that rate by your weight. A 10 lb piece lands at 2 hr 30 min – 3 hr; the range is widened to cover source disagreement rather than averaged into false precision.
- First check. The first thermometer reading is set at 85% of the low end of the range — early enough that an under-reading costs nothing and a late one cannot cost the meal.
- Gate. The time is only a plan. It is not done until a food thermometer reads 140°F in the thickest part, then rests about 15 minutes. Time never overrides temperature on this site.
- Round. Every printed figure is rounded to the nearest 5 minutes; precision beyond that would be invented.
plan_low = weight_lb × 15 min/lb
plan_high = weight_lb × 18 min/lb
first_check = plan_low × 0.85
DONE ⟺ internal_temp ≥ 140°F AND rest ≥ 15 min
(USDA FSIS — the gate, not the clock)
SOURCE·USDA FSIS safe minimum internal temperatures·safe minimum for this cut·REVIEWED JUL 2026
Pick your temperature
Every temperature this chart room holds for a fully cooked bone-in ham, each with its own worked ledger.
The whole cut, temperature by temperature
| Oven temp | Time for a 10 lb ham (fully cooked, bone-in) | Per pound |
|---|---|---|
| 325°F | 2 hr 30 min – 3 hr | 15–18 min/lb |
SOURCE·USDA safe-temperature guidance·timing ranges derived, see method·REVIEWED JUL 2026
When it is actually done
140°F internal
The USDA FSIS safe minimum internal temperature for this cut is 140°F, followed by a rest of about 15 minutes. The clock estimates; the thermometer decides. Every time on this page is a planning range, not a doneness test.
Source note: A 'fully cooked' or 'ready to eat' ham is only being reheated — USDA FSIS says 140°F for a packaged ham (15–18 min/lb for a whole ham, 18–24 for a half). An UNCOOKED fresh ham is a different cut with different rules — see Fresh Ham.
SOURCE·USDA FSIS safe minimum internal temperatures·ham (fully cooked, bone-in) row of the FSIS chart·REVIEWED JUL 2026
What the ledger does not tell you
- Check the label first: 'fully cooked' reheats to 140°F; 'cook before eating' must reach 145°F like fresh pork.
- Add the glaze in the last 20–30 minutes at a raised 400°F — brown sugar burns over a 2-hour reheat.
- A spiral-cut ham dries out faster; reheat it covered with foil and a splash of liquid in the pan, at the low end of the range.
The clock tells you when to start looking. The thermometer tells you when to stop.
