How Long Cook Roast Beef Per Pound? | Timetable & Tips

A general guideline is 20 minutes per pound at 375°F, but the most reliable method uses an instant-read thermometer to check the internal temperature.

You pull a beautiful roast from the oven, slice into it, and find it’s either shoe-leather tough or still mooing in the center. That moment is frustrating, but it happens because cooking by time alone is an unreliable partner.

The honest answer to how long to cook roast beef per pound depends on your oven temperature, the roast’s shape, and your preferred doneness. This guide covers the official time tables, the science of carryover cooking, and why a thermometer beats any clock.

Why Minutes Per Pound Isn’t the Full Picture

Cooking by weight assumes every roast is the same shape and density. A long, thin eye of round will cook faster than a thick, compact rump roast of the same weight.

The standard rule from Allrecipes is to cook roast beef at 375°F for 20 minutes per pound. That gives you a decent starting point, but it doesn’t account for bone-in roasts, which insulate the meat and extend cook time by roughly 5 to 10 minutes per pound.

Your best tool is an instant-read thermometer. The USDA recommends a minimum internal temperature of 145°F for whole beef roasts, followed by a three-minute rest. This safety floor is non-negotiable, but beyond that, doneness is a matter of preference.

Why Carrying Over Changes Everything

When you pull a roast from the oven, the internal temperature keeps climbing for 10 to 20 minutes. That phenomenon is called carryover cooking, and ignoring it is the most common reason for overcooked meat.

• Carryover rise range: A large roast can see a temperature increase of 10 to 15°F after removal. A smaller roast might only rise 5°F.
• Target pull temps: For medium-rare, remove the roast when the thermometer reads about 130°F to 135°F, knowing it will coast up to 140°F to 145°F during rest.
• Resting time: Let the roast sit for 15 to 20 minutes tented loosely with foil before carving. This allows juices to redistribute evenly throughout the meat.
• Thickness matters: A thin, boneless roast has less thermal mass and will carry over less aggressively than a thick bone-in rib roast.
• Tenting vs. wrapping: Tenting loosely with foil is enough to retain heat without trapping steam that softens the crust. Tight wrapping can cause the exterior to sweat and lose crispiness.

Carryover cooking is why experienced cooks pull the roast when it’s still slightly below their target temperature. The rest period finishes the job for you.

Temperature Chart and Doneness Guide

The certifiedangusbeef website publishes clear internal temperature ranges for each level of doneness. Using a thermometer takes the guesswork out of the equation entirely. The chart below shows pull temperatures based on the USDA minimum internal temperature recommendation, adjusted for carryover cooking.

These pull temps assume a 10 to 15°F carryover rise. For a very large roast (over 7 pounds), the rise can be closer to 15 to 20°F, so pull at the lower end of the range.

Cooking Times by Roast Size

Certified Angus Beef provides estimated cooking times at 325°F for various roast sizes. These times are a reliable reference, but you should always verify with a thermometer.

1. 4-pound roast: Approximately 1 hour 45 minutes for medium-rare, or 2 hours 9 minutes for medium. This is a common size for a family Sunday dinner.
2. 5-pound roast: Approximately 1 hour 51 minutes for medium-rare, or 2 hours 18 minutes for medium. Bone-in roasts in this range often need an extra 10 minutes.
3. 6-pound roast: Approximately 1 hour 57 minutes for medium-rare, or 2 hours 26 minutes for medium. Check the temperature at the thickest part, not near the bone.
4. 7-pound roast: Approximately 2 hours for medium-rare, or 2 hours 33 minutes for medium. This size benefits from a lower oven temp (300°F) for more even cooking.

If you prefer higher heat, some sources suggest roasting at 375°F and using the 20-minutes-per-pound rule, but reduce the total time by about 10 to 15 percent and check early.

Alternative Roasting Methods to Consider

Not every cook uses a steady 325°F or 375°F oven. Two alternative approaches exist for those who want a deeply browned crust or a more hands-off process.

The high-heat method calls for roasting at 425°F for roughly 45 minutes to 1 hour, pulling the roast at 125°F internal, then resting for 15 minutes. This technique works best for tender cuts like rib roast or sirloin tip. The intense heat creates a dark, flavorful crust in a short time.

The oven-off method starts the roast at 475°F for 14 minutes (about 7 minutes per pound), then turns the oven off completely without opening the door. The residual heat finishes the roast over the next 1 to 2 hours. This method is forgiving and reduces energy use, but results can be less predictable with unevenly shaped roasts.

The Beef It’s What’s For Dinner program provides a detailed roasting chart that accounts for carryover cooking and suggests pulling a medium-rare roast at 135°F. Their chart is a good companion to the carryover cooking medium rare reference for anyone new to roasting.

The Bottom Line

Minutes per pound is a useful estimate, but a reliable instant-read thermometer is the only tool that guarantees the result you want. Pull your roast 10 to 15°F below your target, let it rest for 15 to 20 minutes tented with foil, and always verify the final internal temperature before slicing.

Whether you’re roasting a four-pound sirloin tip for a Tuesday dinner or a seven-pound prime rib for a holiday table, your meat thermometer is the one kitchen tool that never lies about doneness.