Prime Rib Calculator
Calculate the perfect cooking time for your prime rib roast based on weight, desired doneness, bone type, and cooking method. Get accurate cooking times, temperature targets, and serving estimates for a restaurant-quality prime rib.
Prime Rib Serving Size:
Bone-in: 1 lb (454g) per person
Boneless: 0.5-0.75 lb (227-340g) per person
Cooking Time (325°F):
Rare: 15-17 min/lb
Medium: 20-22 min/lb
Bone-in: 1 lb (454g) per person
Boneless: 0.5-0.75 lb (227-340g) per person
Cooking Time (325°F):
Rare: 15-17 min/lb
Medium: 20-22 min/lb
Example: 8 guests, bone-in
Prime rib needed = 8 × 1 lb = 8 lbs
= 3-4 bone roast
Cooking time (medium-rare):
8 lbs × 18 min/lb = 144 minutes (2.4 hours)
Prime rib needed = 8 × 1 lb = 8 lbs
= 3-4 bone roast
Cooking time (medium-rare):
8 lbs × 18 min/lb = 144 minutes (2.4 hours)
🔗 Related Calculators
📐 Formula
Prime Rib Serving Size:
Bone-in: 1 lb (454g) per person
Boneless: 0.5-0.75 lb (227-340g) per person
Cooking Time (325°F):
Rare: 15-17 min/lb
Medium: 20-22 min/lb
Bone-in: 1 lb (454g) per person
Boneless: 0.5-0.75 lb (227-340g) per person
Cooking Time (325°F):
Rare: 15-17 min/lb
Medium: 20-22 min/lb
📝 Example Calculation
Example: 8 guests, bone-in
Prime rib needed = 8 × 1 lb = 8 lbs
= 3-4 bone roast
Cooking time (medium-rare):
8 lbs × 18 min/lb = 144 minutes (2.4 hours)
Prime rib needed = 8 × 1 lb = 8 lbs
= 3-4 bone roast
Cooking time (medium-rare):
8 lbs × 18 min/lb = 144 minutes (2.4 hours)