What this calculator does
Refrigerator thawing takes about 24 hours for every 4 lb, so a 16 lb turkey needs four full days. Cold water thawing is roughly five times faster at 30 minutes per pound, but the water has to be changed every 30 minutes throughout, which for that same bird means sixteen changes over eight hours.
The one method that is not on the list is the counter. Thawing at room temperature leaves the outer layers sitting in the range where bacteria multiply rapidly for hours while the centre is still frozen solid, and no amount of subsequent cooking makes that a good idea.
The formula
Refrigerator thawing is the weight in pounds divided by 4, giving days. Cold water thawing is the weight multiplied by 30 minutes. Both are USDA rules of thumb and both assume the bird starts solidly frozen. A fridge running warmer than 4°C thaws faster but less safely, and one running colder takes longer than the guideline.
| Term | Meaning |
|---|---|
| 24 hours per 4 lb | The refrigerator thawing rate, which assumes a fridge at or below 4°C. |
| 30 minutes per pound | The cold water rate, requiring the water to be changed every 30 minutes. |
| Danger zone | 4°C to 60°C, the range in which bacteria multiply fastest, and the reason counter thawing is unsafe. |
The inputs explained
| Field | What to enter |
|---|---|
| Turkey weight (lb) | Turkey weight in pounds, as purchased. |
When to use it
Planning backwards from the meal
Thawing is the longest step by far and the one most often started too late. A large bird needs the best part of a week of notice.
Rescuing a bird still frozen
Cold water thawing is the fallback when fridge thawing was started too late, at the cost of changing the water every half hour.
Checking fridge space
A bird thawing for several days occupies a large part of a domestic fridge, which is worth knowing before the rest of the shopping arrives.
Worked examples
Every figure in the tables below is produced by this page’s own calculator at build time, so the numbers and the tool always agree. Select any row to load that scenario.
How long does each turkey size take to thaw?
A range of turkey weights with both thawing methods.
| Turkey weight | Refrigerator thawing time | Cold water thawing time | Cold water thawing, in minutes |
|---|---|---|---|
| 8 lb | 2.0 days | 4.0 hours | 240 min |
| 12 lb | 3.0 days | 6.0 hours | 360 min |
| 16 lb | 4.0 days | 8.0 hours | 480 min |
| 20 lb | 5.0 days | 10.0 hours | 600 min |
| 24 lb | 6.0 days | 12.0 hours | 720 min |
Questions
How long does a turkey take to thaw?
About 24 hours per 4 lb in the refrigerator, so four days for a 16 lb bird. In cold water it is about 30 minutes per pound, or eight hours for the same bird, with the water changed every 30 minutes throughout.
Can I thaw a turkey on the counter?
No. The surface sits in the bacterial danger zone for hours while the middle is still frozen, and the bacteria that multiply in that time are not all destroyed by cooking. Fridge or cold water are the two safe methods.
Why does the cold water need changing?
Because the water warms as it draws heat from the bird, and warm standing water both slows the thawing and creates a hospitable temperature for bacteria. Changing it every 30 minutes keeps it cold and the process moving.
What if the turkey is still partly frozen?
It can still be roasted, but it will take roughly 50% longer and the temperature must be checked carefully in several places. Never stuff a partly frozen bird, since the stuffing will not reach a safe temperature before the outside is badly overcooked.
For roasting time once it is thawed, see the turkey roasting planner. For ham instead, see the ham cooking time calculator.