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—
- 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 rest. That is deliberate. Finishing early is a non-event for the big cuts, because a finished brisket or pork butt 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 |
| Whole chicken | 0.75–1.0 hr/lb | 0.6–0.8 hr/lb | 0.5–0.65 hr/lb |
Ribs are timed by the rack, not the pound
A rack of ribs is thin enough that its weight barely changes the cook; thickness and how much meat sits on the bone matter more. So for ribs the calculator ignores weight and uses a time per rack. Several racks cook in about the same time as one, as long as the smoke can circulate around them.
| Ribs | 225 F | 250 F | 275 F |
|---|---|---|---|
| Baby back | 4.5–5.5 hr | 4–5 hr | 3–4 hr |
| Spare / St. Louis | 5.5–6.5 hr | 4.5–5.5 hr | 3.5–4.5 hr |
| Beef plate short ribs | 8–10 hr | 7–9 hr | 6–8 hr |
Chicken is a different animal
Low-and-slow suits fatty, tough cuts. Chicken has neither, and at 225 F the skin turns rubbery. Most pitmasters smoke whole birds at 275 F or hotter. Whatever the temperature, poultry is only safe once the thickest part of the breast reaches 165 F; thighs are more pleasant to eat a little higher.
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
Brisket, pork butt and short ribs finish in the 195–205 F range, but the real test is feel: a probe should slide into the thickest part of the meat with almost no resistance. Ribs are ready when the rack bends and the surface cracks as you lift it. 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.
That is why a leave-in probe thermometer matters more than any other gadget on a long cook. Our meat thermometer guide covers wired and wireless options.
Related guides
- How to smoke beef short ribs
- How to smoke chicken thighs and wings
- Dry brine vs. wet brine before smoking
- Pork belly burnt ends
Informational only. Verify doneness with a calibrated thermometer; poultry must reach 165 F.