Barbecue runs on a question with no good answer on a recipe card: what time do I put it on? Cook times scale with weight, not with the clock, and the stall makes the back half unpredictable. This works the problem backwards from when you want to eat.
- Cook time range—
- Rest, in a dry cooler—
- Expect the stall—
- Pull at internal temp—
How the numbers work
Cook time is estimated per pound at your chosen smoker temperature, as a range rather than a single figure, because a single figure would be false precision. Two identical briskets at the same temperature can finish two hours apart depending on fat content, airflow, how often the lid comes off, and how long the stall runs.
The start time is calculated against the slow end of the range plus a two hour rest. That is deliberate. Finishing early is a non-event, because a finished brisket holds in a dry, towel-lined cooler for three or four hours and arguably improves. Finishing late means everyone eats at nine. Plan long, rest longer.
Per-pound rates used
| Cut | 225 F | 250 F | 275 F |
|---|---|---|---|
| Brisket (packer) | 1.25–1.75 hr/lb | 1.0–1.5 hr/lb | 0.75–1.25 hr/lb |
| Pork butt | 1.5–2.0 hr/lb | 1.25–1.75 hr/lb | 1.0–1.5 hr/lb |
The stall is the variable
Somewhere around 150–170 F the internal temperature stops climbing, sometimes for hours, as evaporative cooling from the surface matches the heat going in. It is not a stalled fire or a broken thermometer. You can wait it out or wrap through it in foil or butcher paper, which shortens it at the cost of some bark.
Cook to temperature and feel, never to this page
Both cuts finish in the 195–205 F range, but the real test is feel: a probe should slide into the thickest part of the flat with almost no resistance. If the clock says done and the probe says otherwise, the probe is right. This calculator plans your day. It does not tell you when the meat is ready.
Informational only. Verify doneness with a calibrated thermometer.