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Ham Cooking Time Calculator

Written by · Updated August 13, 2026

Enter your ham’s weight and type to get the cooking time at 325°F, plus when to add the glaze and when to start.

Cook time
Active cook
Rest
15 min
Total
Cook to
Pre-cooked: heat to 140°F (60°C). Fresh/raw: 145°F (63°C).

Cooked in oven at 325°F (165°C). Times are estimates, always confirm with a meat thermometer.

How long to cook ham

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.

Ham cooking time by weight

WeightActive 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

Safe internal temperature

Cook to: Pre-cooked: heat to 140°F (60°C). Fresh/raw: 145°F (63°C)..

Tips

  • Cover with foil to keep the ham from drying out while it heats.
  • Brush on glaze during the last 20–30 minutes so the sugars don’t burn.
  • Let it rest 15 minutes before slicing.
These times are estimates that vary with your oven, the starting temperature of the meat and other factors. Always verify doneness with a food thermometer before serving.

Frequently asked questions

How long to cook a ham per pound?

At 325°F, reheat a pre-cooked bone-in ham about 13 min/lb (12 min/lb spiral-sliced) to 140°F; cook a fresh/raw ham about 22 min/lb to 145°F. Add glaze in the last 20–30 minutes.

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