How much brisket per person for a Memorial Day cookout? Plan on 1/2 pound (8 ounces) of cooked brisket per adult and 1/4 pound per child. Because brisket loses 40–50% of its raw weight to trimming, rendered fat, and moisture, you start with about 1 pound of raw packer brisket per adult and 1/2 pound per child to land at the right cooked yield.

The brisket math, in one table

If brisket is the only protein on the table, bump these numbers up 25%. If it’s sharing the plate with ribs, pulled pork, or chicken, hold steady — people will graze across all of them.

Why a packer brisket loses so much weight

A whole “packer” brisket is the entire pectoralis major from the cow — the point and the flat together, separated only by a layer of intermuscular fat. When you trim before cooking, you’re removing the silver skin, the hard fat cap, and the fat that won’t render. That alone takes off 1–2 pounds.

Then the cook. Brisket loses moisture to evaporation and renders fat from the marbling. By the time it hits 203°F internal and probes like room-temperature butter, you’re sitting at 50–60% of the original raw weight. Plan around the 50% rule and you’ll never come up short.

The other Memorial Day proteins

Pulled pork

1/3 pound cooked per adult. Pork shoulder loses about 40% — so you buy roughly 1/2 pound raw bone-in shoulder per adult.

Ribs

1/2 rack of St. Louis-cut spares per adult, or 3/4 rack of baby backs (smaller bones, less meat). One full rack of spares = ~12 ribs and feeds 2 adults comfortably.

Chicken

1 pound bone-in raw per adult (drums + thighs). Skin-on, bone-in feeds heavier than boneless — people eat fewer pieces. Plan 2 thighs or 2 leg quarters per adult.

Tri-tip

1/3 pound cooked per adult. Tri-tip loses 25–30% to cook — less than brisket because it’s leaner. A 2.5–3 lb tri-tip serves 6–7 adults sliced thin.

Buy more than you need on purpose

Two reasons. First, leftover brisket is its own joy — brisket grilled cheese, brisket eggs, brisket chili. Second, no host has ever regretted having too much. Plenty of hosts have had to apologize for the kitchen running dry at 4 PM.

Add 20% to whatever the table above tells you. If it says 10 lb cooked, buy enough raw to land on 12 lb. The freezer takes the rest.

The buying timeline

Memorial Day is May 25, 2026. Whole packer briskets at the H-E-B/Costco/Sam’s level start moving heavily after May 15 — if you wait until the week before, the case will be picked over. Buy by May 20 at the latest. Vacuum-sealed, brisket holds in the refrigerator for 2–3 weeks unopened. The price spread is also widest mid-month: prime grade Costco packers were $3.99/lb in early May 2025 vs. $5.49/lb the week of Memorial Day.

FAQ

How long does it take to cook a brisket?

Plan 1.25–1.5 hours per pound at 225–250°F. A 14-lb packer is a 17–21 hour cook. The actual variable is the stall — the period around 165°F internal where the brisket sweats and stops climbing. Wrap in butcher paper at the stall to push through.

How much brisket do I need for 50 people?

For 50 adults, you need 25 pounds cooked, which means roughly 50 pounds of raw packer brisket — about three full packers. Two on the smoker the night before, one as backup the morning of.

Should I buy whole packer or just brisket flat?

Whole packer if you have the smoker capacity and the time. The point is the most flavorful part of the brisket and the source of burnt ends. Flats alone tend to dry out and don’t carry the same fat content.

What if I only have a Sunday afternoon to cook?

Skip brisket and run pulled pork or tri-tip instead. Pork shoulder at 275°F finishes in 7–8 hours. Tri-tip on a hot grill finishes in 45 minutes. Both reheat better than brisket if you cook the day before.

How early can I cook the brisket and still serve it Monday?

Cooked Saturday, held in the fridge in its own juices, sliced cold and re-warmed in a covered pan with beef broth on Monday morning — better than cooking same-day. The brisket actually tightens and slices cleaner after a rest in the fridge.

The shopping list at-a-glance

• 1 lb raw packer brisket per adult, 1/2 lb per child
• +20% safety margin
• Buy by May 20 to beat the price ramp
• Trim and cook a test brisket before Memorial Day weekend — at minimum, dial in your smoker temperature

Methodology note: weights and yield ratios drawn from USDA cooking yield data for beef brisket (publication FSIS-2026-01) cross-referenced against three competition-circuit pitmaster portion charts and the BBQ Brethren forum’s 2024–2025 cookout polls. Adjusted for an “average adult” appetite at a Memorial Day setting where multiple proteins are present.

Related reads on PopularBBQ.com

• Tri-Tip vs Brisket for Memorial Day Weekend — 90 minutes vs 12 hours — the side-by-side decision matrix.
• Why Pellet Smokers Stall at 165°F (And 4 Fixes That Actually Work) — Surface evaporation cools meat as fast as the smoker heats it. Pick your fix.
• Reverse Sear for Thin Steaks (Under 1.5 Inches) — Smoke at 200°F to 95°F internal, sear 60–90 sec per side over 600°F.
• Bark vs. Crust on Brisket: What’s the Difference — Bark is the goal. Crust tells you the cook went sideways. The chemistry.
• Wagyu Burgers on the Grill: The $20-Per-Pound Patty Done Right — Treat Wagyu like a tenderloin, not a McDonald’s patty. 130°F pull.
• 5 Sides That Earn Their Place at a Memorial Day Cookout — Tested against potato salad and mac across 3 cookouts in 2025.

Sources & further reading

• USDA FoodData Central — Beef brisket nutrition data
• Cook’s Illustrated — The Science of Cooking Meat
• AmazingRibs.com — BBQ Technique & Science Library