How the cooking planner estimates your timeline

Cooking time is one part of the schedule

The planner works backward from the serving date and local time. Start time = serving time minus cooking estimate, planned rest/hot hold, separate contingency, and 30 minutes of preheat. Two-phase cooks also include their sear stage. Rest and contingency are editable and are not folded into cooking hours.

Times across midnight include the calendar date. Durations are subtracted as elapsed time across daylight-saving changes. A nonexistent local time is rejected; when an hour repeats, choose its first or second occurrence. The device timezone is only a starting preference.

Heat diffusion and the stall

Supported roasts use the same browser model in the homepage, brisket tool and coordinator. Heating time depends on a cut-specific diffusion constant, an estimated thickness derived from weight, and the logarithm of the temperature differences between pit, initial meat, and target. Initial meat temperature is assumed to be 38°F. A separate evaporative-stall term responds to humidity, cooker, wrapping and optional weather or preparation inputs.

Foil removes the modeled residual stall dwell. Paper retains 45% and a foil boat retains 70%; these are model assumptions, not measured universal time reductions. No wrap retains the full modeled dwell. Wrapping changes total cooking time by an amount that depends on the whole scenario. It is not a fixed 5% or 10% adjustment.

Ribs and other small or flat-time cuts retain rough fixed-duration rules. Their hours do not scale with total purchase weight. Enter the raw weight of one trimmed piece and the actual piece count, rather than combining the load into one imaginary roast. Multiple pieces need space for airflow.

The heat and moisture ideas are informed by Stull’s wet-bulb approximation and Greg Blonder’s barbecue-stall experiments. Those sources do not validate the accuracy of this application.

A worked brisket example

A 10 lb sliced brisket at 225°F, with a pellet smoker, foil at the modeled wrap point, 38°F initial meat temperature and 195°F texture target, gives approximately 9.8 cooking hours with the default preparation and ambient assumptions. Add 90 minutes rest, 60 minutes contingency and 30 minutes preheat: plan to light the smoker about 12 hours 50 minutes before serving. The calculator retains the full arithmetic internally but presents durations as estimates.

A rough 1.5-hours-per-pound rule gives 15 hours for the same scale weight. That older rule does not model the same geometry and wrapped stall assumptions. Our brisket reference table is generated from the calculator model so matching assumptions give matching results.

Purchasing weight and edible yield

Boneless prepared-weight estimates and untrimmed whole-packer estimates answer different questions. Ribs and whole poultry use labelled whole-rack or piece assumptions. Buying quantities round upward, and the default shopping buffer is 10%. These allowances are planning choices; actual trimming, bones, doneness and appetites vary. See the portion calculator and yield assumptions.

Doneness, safety and holding

A brisket texture target is not a safety threshold or a guarantee of tenderness. Test the thickest relevant portions with a food thermometer. USDA minimum guidance includes 165°F for poultry; 145°F plus at least three minutes rest for whole beef, pork and lamb steaks, chops and roasts; and 160°F for ground meat. Low-and-slow texture goals can be much higher.

Keep hot-held food at 140°F or above. A cooler alone does not guarantee a safe hold duration. Without temperature control, refrigerate perishable food within two hours, or one hour above 90°F. Follow the USDA safe temperature chart and leftovers and holding guidance.

What has and has not been validated

Automated tests check arithmetic, model parity and input behavior. They do not demonstrate real-cook predictive accuracy. The repository includes an offline fitting harness, but we do not publish an accuracy percentage, statistical confidence interval, or claim a representative validated cook dataset here.

Future evidence should include provenance-checked probe logs, cut geometry, actual pit and ambient conditions, wrap timing and a held-out evaluation set across cooker types. Until that evidence is published, treat every output as a planning estimate and choose contingency appropriate to your cook. Contribute a cook log or read our editorial policy.