How Long Cook Roast Beef Per Pound? | Doneness Time & Temperature Chart

Roast beef typically cooks for 15–25 minutes per pound, but the exact time depends entirely on the cut, oven temperature, and desired doneness — an instant-read thermometer is the only way to guarantee perfection.

One wrong timing estimate sends a pricey beef roast past medium into shoe-leather territory. The truth is that “minutes per pound” is never a single number — it shifts with the cut on your counter. A three-pound prime rib and a three-pound sirloin tip reach medium-rare at very different speeds. The table below lays out the official guidelines for each roast, so you can pick the right column before the oven preheats.

Roast Beef Cooking Times: Cut-by-Cut Reference

The standard range of 15–25 minutes per pound at 325°F–350°F covers most boneless roasts, but tenderloin, tri-tip, and petite tender are timed by total minutes, not per-pound math. Check your specific cut in the chart below before setting the timer.

What Internal Temperature Should Roast Beef Reach?

Doneness is determined by the meat’s internal temperature, measured with a digital thermometer inserted into the thickest part, away from bone and fat. The USDA considers 135°F (medium-rare) safe when followed by a three-minute rest.

The internal temperature will rise 5–10°F during the rest period — a phenomenon called carry-over cooking. If you pull the roast at 135°F expecting medium-rare, it will coast to 145°F (medium) on the counter. Pull it at 125°F for a perfect medium-rare after resting.

Three Foolproof Roast Beef Cooking Methods

Standard Oven Method (325°F–350°F)

This reliable approach works with most cuts and produces consistent results, especially when you follow the official guidelines from the Beef Checkoff’s oven-roasting time guidelines.

1. Dry-brine the roast: Rub the surface with salt, place on a rack over a tray, and refrigerate uncovered for 6–24 hours. This dries the exterior for a better crust.
2. Bring to room temperature: Remove from the fridge 45 minutes before cooking. Pat dry with paper towels.
3. Sear (optional but recommended): Heat a heavy skillet over medium-high heat. Sear each side for 4–7 minutes until deeply browned.
4. Roast: Place in the oven at 350°F (325°F for larger roasts per USDA guidelines). Roast until the internal temperature reaches 115°F for medium-rare.
5. Finish with residual heat: Turn the oven off and leave the roast inside for 5–12 minutes per pound, allowing the temperature to climb to your target without drying out.
6. Rest before slicing: Transfer to a cutting board and tent loosely with foil. Rest 15 minutes for small roasts, up to 30 minutes for roasts over 8 pounds.

The internal temperature should stabilize at your target doneness (125°F–135°F for medium-rare) and the juices will pool rather than run clear thin when you slice.

High-Temp Method (500°F)

This method produces a deeply caramelized crust with a tender interior, suited for prime rib or sirloin roasts.

1. Weigh the roast and note the weight. Pat dry and season generously.
2. Insert a digital thermometer into the thickest part. Roast at 500°F for exactly 5 minutes per pound.
3. Without opening the oven door, turn the heat completely off and leave the roast inside until the thermometer reads your target temperature (130°F–140°F for medium-rare).
4. Remove and rest 15–30 minutes before carving.

This method fails if you open the oven door during the off period — the heat escapes and the cooking environment collapses. Use a leave-in thermometer with an external probe so you can monitor without peeking.

Low-Temp Method (275°F)

Ideal for tougher cuts like chuck or rump roast, where a longer, gentler heat breaks down connective tissue. This is closer to a pot-roast approach.

1. Remove the roast 2 hours before cooking. Make slits 2–3 inches deep and stuff with garlic slivers, salt, and pepper.
2. Sear all sides for about 15 minutes total. Deglaze the pan with broth or wine, adding onion and rosemary if desired.
3. Roast at 275°F until the internal temperature reaches 115°F — about 12–15 minutes per pound.
4. Rest 15–30 minutes before slicing.

Common Mistakes That Ruin a Roast

Even experienced cooks hit these snags. Here are the ones to watch for.

• Using the wrong cut chart: Chuck roast needs 30–40 minutes per pound, not the 20 minutes you’d use for sirloin. Check the cut column first.
• Ignoring carry-over cooking: If you pull the roast at 135°F expecting medium-rare, you’ll get medium after resting. Pull 10°F lower than your target.
• Confusing total time with per-pound time: Beef tenderloin and tri-tip are measured in total minutes (25–30 total for a 3-pound tenderloin), not minutes per pound. Using per-pound math here overcooks the meat badly.
• Slicing before resting: Cutting into a hot roast releases all the juices onto the board. A 15-minute rest lets the muscle fibers reabsorb the liquid, keeping each slice tender.

The Roast Beef Checklist: Set Up for Success

Before the roast goes in, run through this short sequence to catch the common oversights. Knowing one number — the cut’s official per-pound time or total minutes — removes almost all guesswork, and the thermometer handles the rest.

• Cut and weight confirmed against the time chart?
• Oven preheated to the right temperature for this cut?
• Digital thermometer inserted into the thickest part, away from bone or fat?
• Final internal temp target set 5–10°F below desired doneness?
• Rest time blocked (15 minutes minimum, 30 for large roasts)?

Follow the chart, trust the thermometer, and respect the rest — that sequence produces a reliably cooked roast every time.