A pellet smoker burns roughly 0.5-1 lb/hr at 225°F and 1.5-2+ lb/hr at high heat. Cold, windy days push that higher. A long brisket cook can easily use 8-12 lbs.
Keep pellets dry
Wet or swollen pellets jam augers and burn poorly. Store them in a sealed, dry bin — it's the #1 cause of temperature problems and auger errors.
FAQ
How many pellets for a brisket?
A 12-16 hour brisket at 225°F uses roughly 8-12 lbs of pellets. Always start with a full hopper plus a spare bag.
How long does a 20 lb bag last?
Around 20-30 hours at 225°F, less at higher temps. Budget about 1 lb per hour to be safe.