Brisket Cook Time Calculator
Inputs
| Brisket weight | 5 kg |
|---|---|
| Smoker temperature | Low (225 °F / 107 °C) |
Brisket Cook Time Calculator
Estimate low-and-slow smoking time for a beef brisket from its weight and smoker temperature, plus a recommended rest before slicing.
Inputs
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Details
A 5 kg brisket needs about ... in a smoker held at 107 °C. Plan for ... in total once you add an hour to rest, and pull the brisket when the internal temperature reaches about 95 °C — not when the clock says so.
Brisket Cook Time
The minutes-per-weight rule is the standard starting point for planning a brisket smoke. At 107 °C, a brisket cooks at roughly 90 minutes per pound, while a hotter smoker at 121 °C finishes closer to 75 minutes per pound.At 225 °F, a brisket cooks at roughly 90 minutes per pound, while a hotter smoker at 250 °F finishes closer to 75 minutes per pound. These figures are a planning aid only — brisket is famously done by internal temperature and feel, not by the clock, and you should always start with hours to spare.
Cook time calculation
For a brisket of weight pounds, the estimated smoke time in minutes is:
ClowChot=W×90=W×75Worked example — 5 kg brisket at 107 °C:
A 5 kg brisket is about 11 lb, so at 90 minutes per pound:
C=11×90=990 min≈16 h 30 minAdding a one-hour rest brings the total to roughly 17 hours 30 minutes.
Worked example — 12 lb brisket at 225 °F:
C=12×90=1080 min=18 hAdding a one-hour rest brings the total to roughly 19 hours.
These are estimates. The thickness and fat content of the brisket, the accuracy and airflow of the smoker, the weather, and how long the cook stalls all change the actual time. A leave-in probe thermometer is the only reliable way to judge doneness.
Cook to temperature, not to the clock
Brisket is finished when the internal temperature in the thickest part reaches about 95 °C203 °F and a probe slides in with almost no resistance. Pulling it earlier leaves the collagen unrendered and the meat tough; this is why the time estimate is only a guide. Always lean on the thermometer.
The stall
Partway through the cook, the internal temperature often plateaus for one to several hours — usually somewhere around 70–77 °C160–170 °F. This is the "stall," caused by evaporative cooling at the surface as moisture wicks out and cools the meat faster than the smoker can heat it. Many cooks push through it by wrapping the brisket in foil or butcher paper, a technique known as the "Texas crutch." Because the stall is unpredictable, never plan a brisket to finish exactly at dinnertime.
Rest before slicing
After the brisket comes off the smoker, let it rest at least one hour — many pitmasters wrap it and hold it in a cooler for one to four hours. Resting relaxes the muscle fibers and lets the juices redistribute, so they stay in the meat instead of running out the moment you slice. Slicing immediately gives a drier, looser result. Slice against the grain for the most tender bite.
For planning the rest of the cookout, the Party Drinks Calculator can help estimate drinks for the crowd, and the Meat Thawing Time Calculator covers safely defrosting a frozen brisket before the cook.
Frequently Asked Questions (FAQ)
How long does it take to smoke a brisket?
At 107 °C, plan for roughly 90 minutes per pound of trimmed brisket; at 121 °C, closer to 75 minutes per pound. A 5 kg brisket therefore takes around 16–17 hours at the lower temperature. These numbers are only a planning guide — brisket finishes when it is probe-tender and the internal temperature is about 95 °C, not when a timer goes off. The "stall," where the surface cools through evaporation, can pause the climb for one to several hours, so always start with hours to spare.
At 225 °F, plan for roughly 90 minutes per pound of trimmed brisket; at 250 °F, closer to 75 minutes per pound. A 12 lb brisket therefore takes around 18 hours at the lower temperature. These numbers are only a planning guide — brisket finishes when it is probe-tender and the internal temperature is about 203 °F, not when a timer goes off. The "stall," where the surface cools through evaporation, can pause the climb for one to several hours, so always start with hours to spare.
What temperature should I smoke a brisket at?
The two most common smoker temperatures are 107 °C and 121 °C. Lower and slower at 107 °C gives more time for collagen to break down and the fat to render, producing a classic bark and tender slices, but it takes longer. Running the smoker at 121 °C shortens the cook by a few hours with only a small trade-off in tenderness. Whichever you choose, the real target is the internal temperature: pull the brisket at about 95 °C, when a probe slides in with almost no resistance.
The two most common smoker temperatures are 225 °F and 250 °F. Lower and slower at 225 °F gives more time for collagen to break down and the fat to render, producing a classic bark and tender slices, but it takes longer. Running the smoker at 250 °F shortens the cook by a few hours with only a small trade-off in tenderness. Whichever you choose, the real target is the internal temperature: pull the brisket at about 203 °F, when a probe slides in with almost no resistance.
Do I need to rest a brisket after smoking?
Yes. Resting is one of the most important steps for a juicy brisket. After it comes off the smoker at about 95 °C, let it rest at least one hour — many cooks wrap it and hold it in a cooler for one to four hours. Resting lets the muscle fibers relax and reabsorb juices that would otherwise spill out the moment you slice. Slicing immediately produces a drier, looser result. The calculator adds a one-hour rest to the total time as a sensible minimum.
Yes. Resting is one of the most important steps for a juicy brisket. After it comes off the smoker at about 203 °F, let it rest at least one hour — many cooks wrap it and hold it in a cooler for one to four hours. Resting lets the muscle fibers relax and reabsorb juices that would otherwise spill out the moment you slice. Slicing immediately produces a drier, looser result. The calculator adds a one-hour rest to the total time as a sensible minimum.
Disclaimer
Smoking times are estimates for a smoker held at 107 °C or 121 °C. Actual time depends on the brisket's thickness and fat content, the smoker's accuracy and airflow, the weather, and how long the cook stalls. Always cook to an internal temperature of about 95 °C measured in the thickest part, and confirm doneness by probe tenderness rather than by the clock.
Smoking times are estimates for a smoker held at 225 °F or 250 °F. Actual time depends on the brisket's thickness and fat content, the smoker's accuracy and airflow, the weather, and how long the cook stalls. Always cook to an internal temperature of about 203 °F measured in the thickest part, and confirm doneness by probe tenderness rather than by the clock.
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