Cooking Time Calculator

A time window from the standard charts, and the temperature that decides

Pick the food, its weight (or thickness, where that is what matters), and whether it starts thawed or frozen. The estimate uses the per-pound or per-inch rates from standard US government roasting and baking charts, and returns a time window, not a false-precise minute. The number that actually decides doneness is the internal temperature, printed with every result alongside where to put the thermometer and how long to rest. Time plans the meal; temperature clears it to be eaten.

Disclaimer: This calculator gives estimates for general information only. It is not financial, medical or other professional advice. Times are planning estimates from standard charts; always verify the safe internal temperature with a food thermometer before serving.

What this calculator does

There is no universal minutes-per-pound rule, and this page does not invent one. Different foods cook at different rates because density, fat, bone and shape differ, so each food here carries its own rate from the standard published charts (the US Department of Agriculture roasting charts and equivalents), expressed as a range because the charts themselves give ranges. Some foods are not weighed into doneness at all: a salmon fillet cooks by thickness, and a chicken breast by its typical piece size, so those entries take inches or work per piece. Every result then defers to the only measurement that settles safety and doneness: the internal temperature, checked in the thickest part, away from bone.

How to use it

  • Start checking at the early end of the window. The window exists because ovens, starting temperatures and shapes vary. Set the first thermometer check at the window’s start; food can always cook longer, and rarely forgives the reverse.
  • Weigh after trimming, as cooked. The charts’ weights are the prepared bird or roast as it enters the oven, not the shop weight with packaging and giblets.
  • Frozen means thaw where you can. The frozen option applies the standard half-again guidance for the foods where cooking from frozen is acceptable. Whole poultry is not safely cooked from frozen in any reasonable time; thaw it in the fridge and use the thawed estimate.
  • Rest is part of the recipe. The stated rest lets juices redistribute and, for large roasts, lets carryover heat finish the centre. Carving early loses both.

The method

  • Per-pound foods: window = weight × the chart’s low and high minutes-per-pound for that food and oven temperature.
  • Per-inch foods: window = thickness × the chart’s minutes per inch.
  • Fixed-window foods: the chart’s window for a typical piece, unscaled, because piece foods do not grow by the pound.
  • Frozen: the window × 1.5, the standard guidance for cooking from frozen, where the food supports it.
  • Temperatures: the published safe minimums: poultry 165°F, ground meats 160°F, beef and pork roasts 145°F with a rest, fish 145°F or until flesh is opaque and flakes.

Worked examples

The 12 lb turkey. At 325°F the chart rate is 13 to 15 minutes per pound unstuffed, so the window is 156 to 180 minutes: 2 hours 36 minutes to 3 hours, with the thermometer (165°F in the thickest part of the thigh, not touching bone) starting its checks at the early end. A stuffed bird needs roughly an extra 30 minutes and its stuffing must itself reach 165°F, which is why the guidance says cook stuffing separately where you can.

The salmon fillet. One inch thick at 425°F runs 10 to 15 minutes by the per-inch rule: a window you can hold in one hand, and a case where weight would say nothing at all, because a wide thin fillet and a narrow thick one of equal weight cook completely differently.

Reading your results

Read the window as a planning bracket: side dishes, resting and serving are scheduled against its early end, and the thermometer arbitrates inside it. Read a result far outside your expectation as a data problem first (wrong weight, wrong state, a bird bigger than the field allows) before treating it as a discovery. And read the temperature line as non-negotiable in both directions: below it is not done however long it has cooked, and far above it is dry however precisely the window was followed.

Limitations

  • Thickness beats weight for flat foods. The chart rates assume typical shapes; a butterflied or unusually thick piece breaks the assumption, which is why the per-inch foods exist and why the thermometer outranks every number here.
  • Ovens vary, and convection varies more. Fan ovens commonly run effectively hotter; many cooks drop the temperature about 25°F or shorten times. The charts are conventional-oven figures.
  • Altitude, pans and starting temperature all move real times. A roast from a cold fridge in a heavy pan at altitude lives at the slow end of its window or beyond it.
  • Ground meat and poultry have no pink shortcut. Their temperatures are the safety line, not a preference, and colour is not a reliable substitute at any point on this page.

Frequently asked questions

Why a window instead of one time?

Because the charts publish ranges and reality agrees with them: two ovens at the same dial setting differ, two birds of the same weight differ in shape, and a single printed minute would be a false promise wearing a lab coat. The window brackets the honest answer, and the thermometer, checked from the window’s early end, converts the bracket into a decision. Precision lives in the temperature, not the clock.

Where exactly do I put the thermometer?

In the thickest part of the food, away from bone, fat seams and the pan: the inner thigh for whole poultry (without touching the bone), the centre of a roast or meatloaf, the thickest fold of a fish fillet. For whole birds, check the breast and the stuffing too if stuffed; the lowest reading in the bird is the bird’s temperature. Let the probe settle for a few seconds; instant-read thermometers are fast, not instantaneous.

Can I cook a turkey from frozen?

The standard guidance is that a whole turkey should be thawed first: from frozen it cooks unevenly enough that the outside overcooks before the centre is safe, and the half-again rule does not rescue it. Smaller solid items and many piece foods cook from frozen acceptably with the longer window, which is what the frozen option models; the page refuses it for whole poultry and says why rather than silently producing a number.

What does resting actually do?

Two things. Juices that cooking drove toward the centre redistribute, so carved meat keeps them instead of flooding the board; and in large roasts the centre’s temperature continues to rise a few degrees from carryover heat, which the charts’ rest times for beef and pork are built around. Tent loosely with foil and give big roasts their full rest; it is the cheapest quality improvement in this entire page.

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Method: per-food rates from standard US government roasting and baking charts (USDA), frozen adjustment at half-again where the food supports cooking from frozen, and published safe internal temperatures with every result. Last reviewed: 15 October 2026.