Alpha Grillers Instant Read Thermometer
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How long to smoke a 4 lb pork loin at 275°F
Mike Ross · How we research · Updated 2026-08-30
At the grate
1h 36m – 2h 24m
Rest
9m – 21m
Cook plus rest
1h 45m – 2h 45m
Plan for
2h 45m
The long end, always
When to light it
Work backwards from the long end. To serve a 4 lb pork loin at 6pm on a Saturday, light the smoker around Saturday 3:15pm — 2h 45m earlier.
That asymmetry is deliberate. Finished barbecue sits in a cooler for hours and arguably improves; an unfinished one at dinner time is not a problem you can solve. Being early is recoverable, being late is not.
The smoker calculator turns your own serve time into a clock time, and handles weights and temperatures between the ones charted here.
Why this is a range and not a time
The same pork loin can finish hours apart between cooks. Grade, fat, airflow, ambient temperature and how often the lid comes off all move the number, and a calculator can see none of them.
So the figures above are the published window, not a prediction. A page that told you “2h 24m exactly” would feel more precise and be less true.
What temperature to pull it at
Pull between 145–150°F internal. The USDA safe minimum for this cut is 145°F, which is a food-safety floor rather than a target.
Not a low-and-slow cut. Pull at 145°F and rest — every degree past that costs moisture.
Safe minimums from the USDA FSIS Safe Minimum Internal Temperature Chart.
How much fuel it takes
On a pellet grill at 275°F, this cook burns roughly 2–4.2 lb of pellets — so have a 20 lb bag on hand. Cold and windy days push that higher.
For an offset or a charcoal cooker there is no figure here, and that is on purpose. Consumption depends on firebox size, wood species, split moisture and how the pit is run, and a number would be a guess wearing an estimate’s clothes.
The same cut at other temperatures
Published figures for pork loin run 225–275°F. Outside that range we have no chart to work from and will not extrapolate one.
Other weights at 275°F
What this cook actually needs
Every figure on this page is a range, and the only thing that closes it is measuring the internal temperature — more so on a cut this quick, where the window between done and dry is narrow.
Bear Mountain Hickory BBQ Pellets
Hardwood pellets with nothing else in them. The default fuel for any pellet grill.
- Wood
- 100% hardwood, hickory over an alder or oak base
- Bag sizes
- 20 lb and 40 lb
Hardwood pellets
Check current price on AmazonCommon questions
- How long to smoke a 4 lb pork loin at 275°F?
- 1h 36m – 2h 24m at the grate, plus 9m–21m of rest. Plan 2h 45m in total and hold it if it finishes early — finished barbecue keeps, unfinished barbecue cannot be hurried.
- What internal temperature should a 4 lb pork loin be pulled at?
- 145–150°F. The USDA safe minimum for this cut is 145°F, which is a food-safety floor rather than a target. Not a low-and-slow cut. Pull at 145°F and rest — every degree past that costs moisture.
- Can you smoke a 4 lb pork loin faster than 275°F?
- Yes, within limits. Published figures for this cut run 225–275°F, and the hottest of those brings the cook down to 2h 24m at the long end. Past that range we have no published chart to work from and will not guess.