The following is from the United States Department of Agriculture:
For safety, the USDA recommends cooking
ground pork patties and ground pork mixtures such as meat loaf to 160°F (70°C).
Whole muscle meats such as chops and roasts should be cooked
to
- 160 °F (70°C) medium
- 170 °F (75°C) well done
For
approximate cooking times for use in meal planning, see the attached
chart compiled from various resources. Times are based on starting with pork at
refrigerator temperature (40 °F - 4.5 °C).
Remember that appliances and
outdoor grills can vary in heat. Use a meat thermometer to check for
safe cooking and "doneness" of pork.
If fresh pork has
reached 160 °F (70°C) throughout, it should be safe, even though it may still be pink in
the center. The pink color can be due to the
cooking method or added ingredients.
http://www.fsis.usda.gov/Fact_Sheets/Pork_from_Farm_to_Table/index.asp

Safe Cooking Chart for Pork
ROASTING:
- Set oven at 350 °F (180° C, Gas Mark 4).
- Roast in a shallow pan, uncovered.
- Internal temperature: 160° F (70°C)
- medium; 170°F (75°C) - well done.
Or try Startcooking.com's photo-tutorial on Pork Roast
|
Cut
|
Thickness or
Weight
|
Cooking Time
|
|
Loin Roast,
Bone-in or Boneless
|
2 to 5 pounds
|
20-30 minutes per
pound
|
|
Crown Roast
|
4 to 6 pounds
|
20-30 minutes per
pound
|
|
Leg, (Fresh Ham)
Whole, Bone-in
|
12 to 16 pounds
|
22-26 minutes per
pound
|
|
Leg, (Fresh Ham)
Half, Bone-in
|
5 to 8 pounds
|
35-40 minutes per
pound
|
|
Boston Butt
|
3 to 6 pounds
|
45 minutes per pound
|
|
Tenderloin (Roast
at 425-450 °F)
|
½ to 1½
pounds
|
20 to 30 minutes
total
|
|
Ribs (Back,
Country-style or Spareribs)
|
2 to 4 pounds
|
1½ to 2 hours
(or until fork tender)
|
BROILING 4 inches from heat or
GRILLING
|
Cut
|
Thickness or
Weight
|
Cooking Time
|
|
Loin Chops,
Bone-in or Boneless
|
¾-inch or 1½
inches
|
6-8 minutes or 12-16
minutes
|
|
Tenderloin
|
½ to 1½
pounds
|
15 to 25 minutes
|
|
Ribs (indirect
heat), all types
|
2 to 4 pounds
|
1½ to 2 hours
|
|
Ground Pork
Patties (direct heat)
|
½ inch
|
8 to 10 minutes
|
IN SKILLET ON STOVE
|
Cut
|
Thickness or
Weight
|
Cooking Time
|
|
Loin Chops or
Cutlets
|
¼-inch or
¾-inch
|
3-4 minutes or 7-8
minutes
|
|
Tenderloin
Medallions
|
¼ to ½-inch
|
4 to 8 minutes
|
|
Ground Pork
Patties
|
½ inch
|
8 to 10 minutes
|
BRAISING: Cover and simmer with
a liquid.
|
Cut
|
Thickness or
Weight
|
Cooking Time
|
|
Chops, Cutlets,
Cubes, Medallions
|
¼ to 1-inch
|
10 to 25 minutes
|
|
Boston Butt,
Boneless
|
3 to 6 pounds
|
2 to 2½ hours
|
|
Ribs, all types
|
2 to 4 pounds
|
1½ to 2 hours
|
STEWING: Cover pan; simmer,
covered with liquid.
|
Cut
|
Thickness or
Weight
|
Cooking Time
|
|
Ribs, all types
|
2 to 4 pounds
|
2 to 2½ hours,
or until tender
|
|
Cubes
|
1-inch
|
45 to 60 minutes
|
NOTE:
Cooking times compiled from various resources. Source: USDA
Last modified - February 2003
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