100
min
1.67
hrs
1
hrs
40
min
20
min/lb
100
min
1.67
hrs
1
hrs
40
min
20
min/lb
The Cooking Time Calculator takes the guesswork out of determining how long to cook meat and other foods by weight. Most roasting and baking guidelines specify a minutes-per-pound rule at a given oven temperature — this calculator instantly converts your food's weight into a precise cooking time.
Cooking time by weight is commonly used for roasting whole poultry (chicken, turkey), beef roasts, pork loins, lamb legs, and whole fish. The minutes-per-pound guideline varies significantly by food type and desired doneness: a whole turkey might cook at 13–15 minutes per pound at 325°F, while a medium-rare beef tenderloin needs only 15–20 minutes per pound at 425°F, and a well-done pork shoulder slow-roasts at 35–40 minutes per pound at 300°F.
This calculator provides the total cooking time in minutes and the equivalent in hours. Remember that cooking time is a guideline — the only reliable way to confirm doneness is to use a meat thermometer and check internal temperature. USDA safe internal temperatures: poultry (165°F), ground beef (160°F), whole beef/pork/lamb (145°F with 3-minute rest). Allow a rest period of 5–20 minutes after cooking for the juices to redistribute before carving.
The calculation is a direct linear relationship between weight and cooking time.
Total cooking time: $$T_{minutes} = W \times R$$ where $$W$$ is the food weight in pounds and $$R$$ is the recommended rate in minutes per pound for your food type and oven temperature. This gives total cooking time in minutes.
Converting to hours: $$T_{hours} = \frac{T_{minutes}}{60}$$ For display purposes: whole hours = $$\lfloor T_{minutes} / 60 \rfloor$$ and remaining minutes = $$T_{minutes} \mod 60$$
Effect of oven temperature: Higher temperatures generally require fewer minutes per pound. For example, chicken at 350°F: 20 min/lb, at 400°F: 15 min/lb, at 425°F: 12 min/lb. Always use the minutes-per-pound value specified for your target temperature in the recipe. Convection ovens cook faster — reduce time by 25% or temperature by 25°F compared to conventional oven guidelines.
Important note: Stuffed birds and roasts cook more slowly than unstuffed — add 15–30 minutes to the calculated time and ensure stuffing reaches 165°F internally.
Use the calculated time as your starting estimate, but begin checking internal temperature about 15–20 minutes before the calculated end time to prevent overcooking. Large roasts (10+ lbs) and dense foods may need additional time; thin cuts may finish faster. Insert a meat thermometer into the thickest part of the meat, avoiding bone, which conducts heat differently. Let the meat rest — tenting loosely with foil — before serving: 5 minutes for small cuts, 15–20 minutes for large roasts, and 30+ minutes for whole turkeys. Internal temperature continues to rise 5–10°F during resting (carryover cooking).
Inputs
Results
A 4 lb whole chicken at 350°F takes approximately 80 minutes (1 hr 20 min). Start checking temperature at 65 minutes — target 165°F in the thigh.
Inputs
Results
A 14 lb turkey at 325°F takes approximately 3 hours 30 minutes. Begin temperature checks at 3 hours — USDA target is 165°F in the innermost thigh.
USDA recommended minimum internal temperatures: Poultry (chicken, turkey, duck) — 165°F (74°C). Ground meats (beef, pork, lamb, veal) — 160°F (71°C). Whole beef, pork, lamb, veal (steaks, roasts, chops) — 145°F (63°C) with 3-minute rest. Fish and shellfish — 145°F (63°C). Ham (raw) — 145°F. These temperatures ensure destruction of harmful bacteria including Salmonella, E. coli, and Listeria.
Yes significantly. Higher temperatures cook the exterior faster and generally require fewer minutes per pound, but can dry out the surface before the interior reaches safe temperature. Lower temperatures (250–300°F) cook more evenly and gently, often producing juicier results but requiring more time. For large roasts, many recipes recommend starting at a higher temperature for browning, then reducing to finish cooking — the calculator is best used for a single-temperature approach.
Heat penetration is the limiting factor. As a roast's weight increases, its diameter also increases (roughly as the cube root of weight). A 10 lb roast doesn't take exactly twice as long as a 5 lb roast — it takes less proportionally because the same amount of oven heat penetrates a slightly larger diameter. Professional cooking guides account for this non-linearity in their minutes-per-pound recommendations, which is why large turkey guidelines use fewer minutes per pound than small turkey guidelines.
Carryover cooking is the continued rise in internal temperature after removing food from the heat source. This occurs because the exterior of the meat is hotter than the center — heat continues flowing inward even after the oven is off. Typical carryover: small roasts and poultry 5–8°F rise; large roasts (10+ lbs) 10–15°F rise. Remove meat from the oven when it is 5–10°F below target temperature to account for this rise during resting.
Convection ovens circulate hot air, cooking food approximately 25% faster or allowing a 25°F temperature reduction compared to conventional ovens for equivalent results. Two methods: keep the same temperature as specified and reduce time by 25%, or reduce temperature by 25°F and use the same time. Most professional chefs prefer reducing temperature (to prevent over-browning) while keeping the original time, then checking for doneness earlier.
Many chefs recommend resting meat at room temperature for 30–60 minutes before roasting to promote more even cooking. However, the USDA cautions that leaving raw meat at room temperature for over 2 hours (or 1 hour above 90°F) creates a food safety risk. A brief 30-minute rest at room temperature is generally safe for most cuts and can improve cooking consistency, particularly for thick steaks and roasts over 3 lbs.
Roboculator Team
The Roboculator Team explains calculations, planning tools, and practical formulas in clear language for real-life situations.
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