How Long to Cook a Turkey: Why Minutes per Pound Runs Early
September 25, 2026
It is four o’clock. Dinner was meant to be at four. The recipe said a 16-pound turkey takes about three and a half hours, the bird went in at half past twelve, and the thermometer in the thigh reads 148 °F. Nobody did anything wrong. The rule of thumb was just a straight line, and a turkey is not a straight line.
This guide gives you the number first, then explains why that number is earlier than the official chart, and what to do about it.
The short answer
Roast at 325 °F (165 °C) and allow about:
- 13 minutes per pound for an unstuffed turkey (about 29 minutes per kilogram)
- 15 minutes per pound for a stuffed one (about 33 minutes per kilogram)
- plus 20–30 minutes of resting before you carve
The turkey is done when the thermometer says so, whatever the clock says: 165 °F (74 °C) in the thickest part of the thigh, and in the centre of the stuffing if the bird is stuffed. The per-pound figure is for planning. It tells you when to put the bird in and when to start checking. The thermometer tells you when it is done.
Those are the numbers behind our turkey cooking time calculator. Give it a weight in pounds or kilograms and, if you like, the time you want to eat, and it works out when the bird has to go in the oven.
The chart
Straight from the calculator: 13 and 15 minutes per pound at 325 °F, with fridge thawing at 24 hours per 4 lb, rounded up to whole days.
| Turkey weight | Unstuffed | Stuffed | Fridge thaw |
|---|---|---|---|
| 8 lb (3.6 kg) | 1 hr 44 min | 2 hr | 2 days |
| 10 lb (4.5 kg) | 2 hr 10 min | 2 hr 30 min | 3 days |
| 12 lb (5.4 kg) | 2 hr 36 min | 3 hr | 3 days |
| 14 lb (6.4 kg) | 3 hr 2 min | 3 hr 30 min | 4 days |
| 16 lb (7.3 kg) | 3 hr 28 min | 4 hr | 4 days |
| 18 lb (8.2 kg) | 3 hr 54 min | 4 hr 30 min | 5 days |
| 20 lb (9.1 kg) | 4 hr 20 min | 5 hr | 5 days |
| 22 lb (10.0 kg) | 4 hr 46 min | 5 hr 30 min | 6 days |
| 24 lb (10.9 kg) | 5 hr 12 min | 6 hr | 6 days |
Add the resting time to every row. Before you trust the chart for a small or mid-size bird, read the next section.
The official chart bends, and the rule of thumb doesn’t
The USDA’s Food Safety and Inspection Service publishes the timetable most American recipes are built on, in its consumer guide Let’s Talk Turkey. It gives ranges by weight band, not a per-pound rate. Put those ranges beside the 13-minute line and you can see where the straight line goes wrong:
| Weight band (unstuffed) | USDA time at 325 °F | USDA, per lb at mid-band | 13 min/lb at mid-band |
|---|---|---|---|
| 8–12 lb | 2¾–3 hr | ≈ 17 min | 2 hr 10 min (10 lb) |
| 12–14 lb | 3–3¾ hr | ≈ 16 min | 2 hr 49 min (13 lb) |
| 14–18 lb | 3¾–4¼ hr | ≈ 15 min | 3 hr 28 min (16 lb) |
| 18–20 lb | 4¼–4½ hr | ≈ 14 min | 4 hr 7 min (19 lb) |
| 20–24 lb | 4½–5 hr | ≈ 13 min | 4 hr 46 min (22 lb) |
USDA per-pound figures are our arithmetic: the middle of each time range divided by the middle of its weight band.
The USDA chart only reaches 13 minutes per pound at the top, for 20 to 24 lb birds. A 10 lb bird, by USDA’s figures, needs closer to 17 minutes a pound. So the flat rule comes out 35 to 50 minutes early for a 10 lb bird and 17 to 47 minutes early for a 16 lb one. For the biggest birds it lands inside USDA’s range. The stuffed column behaves the same way: USDA gives 3 to 3½ hours for a stuffed 8–12 lb bird, while 15 minutes a pound gives a 10 lb bird 2½ hours.
Butterball’s roasting chart shows the same curve, and its numbers are flatter still: 3 to 3½ hours covers everything from 10 to 18 lb. If you work that out per pound, it drops from 18–21 minutes for a 10 lb bird to 10–12 minutes for an 18 lb one.
Why a bigger turkey cooks faster per pound
Roasting time depends on how far heat has to travel to reach the middle of the thickest part, not on total weight. Heat comes in through the surface and works inward. When a bird doubles in weight it does not get twice as thick. It grows in all three directions at once, so its thickness goes up by only about a quarter. The extra pounds are spread across a bigger bird instead of piled on top of the centre. So each added pound adds less time than the pound before, and any per-pound rule is really a line drawn through a curve.
That is why the two sources disagree even though neither is wrong. A single per-pound figure is easy to remember and scales with any weight, and at 13 minutes it matches USDA for the big holiday birds. USDA’s chart is harder to use but follows how heat actually moves through a bird. So here is the takeaway: the per-pound figure tells you the earliest the turkey might be done. It is not a promise.
How to plan so dinner is on time
Everything above comes down to one habit. Use the calculator’s time as the moment to start checking, and leave slack after it.
- Work backwards from dinner. Put your serve time into the turkey calculator. For a 16 lb unstuffed bird and a 5:00 pm dinner, it says in the oven by 1:02 pm. That is 3 hours 28 minutes of roasting plus a 30-minute rest.
- Add slack for a small or mid-size bird. Under about 20 lb, USDA’s chart says it can run later. For that same 16 lb bird, USDA’s range ends 47 minutes after the calculator’s figure. Put it in 45 minutes to an hour earlier than the calculator says.
- Start checking at the calculator’s time. Push the probe into the innermost part of the thigh, the wing and the thickest part of the breast, and don’t let it touch bone. Those are the three places USDA says to check. It is done when every spot reads 165 °F / 74 °C.
- Use the extra time as resting time. If it is done early, tent it loosely with foil and let it wait. A whole bird holds its heat for a long time, and the extra rest only helps it carve cleanly. A turkey that finishes 40 minutes late is a real problem; one that finishes 40 minutes early mostly isn’t.
165 °F, 170 °F, and resting: where the sources differ
Internal temperature. USDA’s safe minimum for turkey is 165 °F (74 °C), and that is the figure the calculator uses. Butterball’s own instructions go higher: the turkey is done at 170 °F in the thigh and 170 °F in the breast or stuffing. That isn’t a disagreement about safety. 165 °F is the minimum, and Butterball is aiming above it because thigh meat has a lot of connective tissue and is more pleasant a few degrees hotter. Neither source tells you to take a turkey out below 165 °F, and nor do we.
Resting. USDA says to let the turkey stand for 20 minutes so the juices set. Butterball says 15. The University of Illinois Extension says 20 to 30. The calculator uses 30, at the long end, because in practice resting is also your slack. A big bird is still hot after half an hour, and that half-hour is when the gravy gets made.
Stuffed or not
A stuffed bird takes longer because the stuffing sits right in the middle, where heat reaches last, and it has to get just as hot as the meat: 165 °F in the centre of the stuffing. The meat is often done while the stuffing is still short of that. USDA’s own advice is that the safest option is to cook stuffing separately, in a casserole. If you do stuff the bird, the Illinois Extension suggests ½ to ¾ cup of stuffing per pound and packing it loosely, because it expands as it cooks. Check the stuffing with the thermometer as well as the thigh. If the stuffing hasn’t reached 165 °F, the bird goes back in, however good the meat looks.
Thawing: the part that starts days earlier
Most turkey disasters happen before the oven goes on. USDA’s rates, from its safe thawing guide:
- In the fridge: about 24 hours for every 4 to 5 lb, at 40 °F (4 °C) or colder. The calculator uses the slower end, 24 hours per 4 lb, and rounds up to whole days. A 16 lb bird needs 4 days. For US Thanksgiving on Thursday 26 November 2026, that means it goes into the fridge on Sunday the 22nd. Once thawed, USDA says it can wait in the fridge another day or two, so starting early costs you nothing.
- In cold water: about 30 minutes per pound, still in a leak-proof wrapper, with the water changed every 30 minutes. It’s faster but you have to keep at it, and the turkey has to be cooked as soon as it’s thawed.
- Never on the counter. Room-temperature thawing isn’t one of the options.
Set the calculator to Frozen and choose a thaw method, and the thaw time appears next to the roasting time.
Questions that come up on the day
Can I roast lower and slower? Not below 325 °F. USDA’s roasting guide says to set the oven no lower than 325 °F. Everything in this article assumes that temperature.
My recipe is in Celsius, or my oven is a fan oven. The calculator’s metric setting uses 165 °C, the usual metric equivalent of 325 °F. Fan ovens cook faster, so drop the temperature as your oven’s manual suggests, or run the setting through the oven temperature converter. Then start checking the thermometer earlier than the chart says.
Does brining change the time? Not much. It changes the seasoning and how well the meat holds its juices, not how far heat has to travel. Our guide to how much salt goes in a brine covers the ratios, and the brine calculator works them out for your bird and pot.
What about smoking it? Smoking is a different, slower method with its own timing. The meat smoking calculator covers a whole turkey at smoker temperatures. The same rule applies: done is 165 °F, not a time.
Putting it together
For the thawing, the oven-in time and the first thermometer check, the turkey cooking time calculator does the arithmetic. Just treat its roasting time as the earliest the bird will be done, and plan the rest of the meal around a turkey that might need longer. If you’re cooking for a crowd, the party food calculator works out how much of everything else to make, so the sides and the bird come out of the kitchen together.
Always cook poultry to a safe internal temperature and follow current food-safety guidance. See our disclaimer.