A fully frozen 20 lb turkey typically takes about 4–5 days to thaw in the refrigerator, or around 10 hours using the cold-water method.

Fridge thaw time

For a 20 lb turkey in the refrigerator:

  • Food safety guidelines recommend about 24 hours in the fridge for every 4–5 lb of turkey.
  • That works out to roughly 5 days for a 20 lb bird, with most charts listing 4–5 days (start thawing the Saturday–Sunday before a Thursday meal).

Cold water thaw time

If you are short on time, use the cold water method:

  • Allow about 30 minutes per pound in cold water, changing the water every 30 minutes.
  • For a 20 lb turkey, that is about 10 hours total in cold water before cooking immediately.

Quick safety tips

  • Keep the turkey in its original wrapping while thawing in the fridge or submerged cold water.
  • Never thaw a turkey at room temperature on the counter; this can let bacteria grow in the outer layers while the inside is still frozen.

Simple planning example

  • For a Thursday holiday dinner with a 20 lb turkey, put it in the fridge no later than Sunday morning for a safer, slower thaw.
  • If you forget, you can combine partial fridge thawing with a final cold-water thaw on the day before or the morning of cooking, still following the 30-minutes-per-pound rule.

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