Enter your roast's weight and target doneness to estimate cooking time at 325°F.
A standing rib roast is typically cooked low and slow at 325°F, with cooking time driven mainly by weight and target internal temperature. Convection ovens circulate air more efficiently and typically cook 15–25% faster than conventional bake, so this calculator adjusts for oven type.
Source: Time-per-pound estimates are based on standard 325°F standing rib roast charts used by culinary references and USDA safe temperature guidance for beef.
A large roast keeps cooking from residual heat after it leaves the oven, a phenomenon called carryover cooking — internal temperature can rise another 5–10°F while it rests, so pulling it early prevents overshooting your target doneness.
Convection ovens typically cook 15–25% faster than conventional ovens for large roasts, because the circulating air transfers heat more efficiently — this calculator applies an 18% reduction as a starting estimate.
Time-per-pound is only an estimate for planning purposes. Always confirm doneness with an instant-read or leave-in meat thermometer in the center of the roast, since factors like bone-in vs. boneless and starting temperature affect actual cook time.
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