At 275°F, most whole turkeys take roughly 20–30 minutes per pound , but the real answer is: cook by internal temperature , not time.

Quick Scoop

  • Plan on about 25 minutes per pound at 275°F as a starting estimate.
  • A 12 lb turkey will often take around 4.5–5.5 hours at 275°F.
  • A 15 lb turkey can take about 5–6+ hours , depending on your smoker and whether the bird is stuffed, brined, or spatchcocked.
  • Always cook until the breast hits 160–165°F and the thigh 170–175°F , checked with a good thermometer.
  • Let the turkey rest 20–30 minutes before carving so juices redistribute and carryover cooking finishes it.

Time Guidelines at 275°F

  • Some barbecue guides suggest around 15 minutes per pound at 275°F , especially with hotter-running smokers or smaller birds.
  • Others use 25 minutes per pound at 275°F , particularly for low‑and‑slow, very smoky cooks.
  • Home cooks on smoking forums often report a 4–6 hour window at 275°F for birds in the 12–16 lb range, with big variation from weather, smoker type, and how often the lid is opened.

Because smokers run differently and opening the lid dumps heat, treat any “minutes per pound” as a rough guide to meal‑planning, not a guarantee.

Simple Step‑By‑Step Plan

  1. Preheat and stabilize
    • Get the smoker steady at 275°F for 20–30 minutes before the turkey goes on for more even cooking.
  1. Prep the turkey
    • Pat dry, season inside and out, and consider a brine or injection for extra juiciness.
 * Spatchcocking (removing the backbone and flattening) usually **shortens cook time** and helps the breast and thighs finish closer together.
  1. Smoke the bird
    • Place on the grates, breast up (or spatchcocked skin side up), and avoid constantly opening the smoker to keep your 275°F target.
 * Start checking internal temp with a thermometer **about 2/3 of the way into your estimated time** (for a 12 lb bird at 25 min/lb, start checking around the 3.5–4 hour mark).
  1. Check for doneness
    • Thickest breast: 160–165°F.
    • Inner thigh: 170–175°F.
    • If one area is lagging, you can tent done parts with foil while the rest finishes.
  1. Rest and carve
    • Rest 20–30 minutes loosely tented with foil; internal temperature will rise a few degrees and juices will settle.

Safety & Extra Tips

  • Skip stuffing the cavity when cooking at lower temps; food-safety guides warn that stuffing can sit too long in the “danger zone” at these smoker temperatures.
  • Wind, outside temperature, pellet quality, and how crowded the smoker is can all nudge your total time up or down, so always trust the thermometer over the clock.
  • If the skin is lagging behind and not crisp enough once the turkey is at a safe internal temperature, some pitmasters briefly crank heat or finish in a hotter oven to tighten the skin without overcooking the meat.

Information gathered from public forums or data available on the internet and portrayed here.