Written by Mustapha B. · Updated August 13, 2026
Spiral hams are pre-cooked, you’re just reheating gently. Enter the weight for timing at 325°F.
Cooked in oven at 325°F (165°C). Times are estimates, always confirm with a meat thermometer.
Spiral-sliced hams are sold fully cooked, so you are gently reheating, not cooking from raw. Plan on about 10 minutes per pound at 325°F, which means a 9-pound spiral ham takes roughly an hour and a half. Because the meat is already sliced, it dries out easily, so cover the whole ham tightly with foil to trap steam and keep every slice moist while it warms in the center.
Reheat a fully cooked spiral ham to an internal temperature of 140°F, checking the thickest part away from the bone. Add the glaze during the final 15 to 20 minutes, uncovered, so it sets into a shiny crust instead of burning. A reliable tip: pour a splash of water, broth, or juice into the bottom of the pan before covering, which creates extra steam and protects the cut surfaces from going leathery.
The cooking time for ham depends mainly on its weight and how you’re cooking it. As a starting point, the table below shows estimates in oven at 325°F (165°C) for the pre-cooked, bone-in (reheat) method. Add the resting time, and remember a thermometer is the only way to know it’s truly done.
| Weight | Active cook (Pre-cooked, bone-in (reheat)) | + Rest |
|---|---|---|
| 3 lb | 40 min | 55 min |
| 6 lb | 1 hr 20 min | 1 hr 35 min |
| 8.5 lb | 1 hr 50 min | 2 hr 5 min |
| 11.5 lb | 2 hr 30 min | 2 hr 45 min |
| 14.5 lb | 3 hr 10 min | 3 hr 25 min |
| 17 lb | 3 hr 40 min | 3 hr 55 min |
| 20 lb | 4 hr 20 min | 4 hr 35 min |
Cook to: Pre-cooked: heat to 140°F (60°C). Fresh/raw: 145°F (63°C)..
About 10 minutes per pound at 325°F, covered with foil, until it reaches 140°F inside. A 9-pound ham takes roughly 90 minutes.
Cover it tightly with foil, add a little liquid to the pan for steam, and heat at a moderate 325°F. Save the glaze for the last 15 to 20 minutes so it caramelizes without overcooking the slices.