Prime Rib Per Person Calculator
Enter your guest count and whether you're buying bone-in or boneless to see the total weight to buy.
How this works
Bone-in roasts need more raw weight per person because bone doesn't add edible meat, and some weight is lost to trimming and cooking shrinkage. Standard butcher guidance is about 3/4 to 1 pound of bone-in prime rib, or about 1/2 pound of boneless, per person as a main course.
Source: Based on standard butcher and culinary guidance of about 1/2 lb boneless or 3/4–1 lb bone-in per person for a main course serving.
Frequently asked questions
How much bone-in prime rib do I need per person?
Plan for about 3/4 to 1 pound of bone-in prime rib per guest for a generous main-course serving; this calculator uses 7/8 lb per person as a middle estimate.
How much boneless prime rib do I need per person?
Boneless roasts have no inedible bone weight, so about 1/2 pound per person is a standard serving estimate for a main course.
Should I buy more if I want leftovers?
Yes — add roughly an extra 1/4 to 1/2 pound per person you want to have leftovers for, since prime rib sandwiches and hash are popular next-day uses.
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