Cook-Capacity & Hopper Burn-Time Calculator

The honest answer to the question behind every long cook: can I sleep through this, or will it run dry? Enter what you're cooking, the set temperature, how cold it is outside and how long the cook runs. The calculator estimates the grate area you need (in square inches) and how long a hopper of pellets will last — so you can size the grill and plan your refills before you light it.

How this is calculated

These are estimates from published rules of thumb and manufacturer specs — not a lab measurement of your specific grill. Use them to size a grill and plan refills, then watch your own first cook to dial it in.

  • Grate area: roughly 300 sq in per whole brisket or pork shoulder, 150 sq in per rack of ribs laid flat, and 25 sq in per extra guest — summed, with a little headroom.
  • Pellet burn-rate: a baseline of about 1 lb/hr at 225°F, scaling up with set temperature and with cold ambient weather (cold nights push burn-rate well above the mild-weather figure). Typical real-world range is ~1–3 lb/hr.
  • Hopper burn-time: hopper capacity (lb) divided by the estimated burn-rate (lb/hr). If that's shorter than your cook duration, you'll need to refill — the "run dry" warning.

And the one that isn't an estimate: cook all meats to a safe internal temperature verified with a probe thermometer, following USDA safe-temperature guidance. Doneness is decided by internal temp, not by time — when in doubt, probe it.

Need more grate or hopper? See the best pellet smokers → Stock up on pellets: best pellets & accessories → New to pellet grills? Start with the beginner's guide →