Cooking Time by Weight Calculator
Estimate roasting or baking time for any cut of meat based on its weight, meat type, oven temperature, and doneness preference. Use it whenever you need a reliable cook-time target before a meal.
Last updated: September 2026
Formula below · 2 sources (fdc.nal.usda.gov, Wikipedia) · Updated Sep 2026
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About this calculator
Roasting time scales roughly with weight, adjusted for meat type and oven temperature. The formula is: cookingTime (minutes) = weight × minutes-per-pound × temperature factor + 15 minutes for roasts over 3 lb. The meat options use 20 min/lb for beef roast, 25 for pork, 15 for chicken and 18 for turkey at 350–375 °F; the temperature factor is 1.2 for 300–325 °F, 1.0 for 350–375 °F and 0.8 for 400–425 °F. The extra 15 minutes for larger roasts covers the slower start of a big piece of meat. Always verify with a meat thermometer: USDA minimums are 165 °F for poultry, 145 °F with a 3-minute rest for whole cuts of beef, pork, veal and lamb, and 160 °F for ground meat.
How to use
Suppose you have a 5 lb whole chicken (15 min/lb) roasted at 400–425 °F (factor 0.8). Step 1 — weight × minutes per pound: 5 × 15 = 75 minutes. Step 2 — temperature factor: 75 × 0.8 = 60 minutes. Step 3 — add 15 minutes because the bird is over 3 lb: 75 minutes. Start checking early and remove it when the thickest part of the breast and the innermost thigh read 165 °F.
Frequently asked questions
How does oven temperature affect cooking time per pound of meat?
Higher oven temperatures reduce cooking time because more thermal energy reaches the meat per minute. This calculator uses a factor of 0.8 for 400–425 °F and 1.2 for 300–325 °F relative to 350–375 °F, so a hot oven cuts the time by about 20% and a low oven adds about 20%. However, very high temperatures can brown the exterior before the interior is safe, so matching temperature to meat type matters.
What is the meatType factor and how is it determined for different cuts?
The meatType factor is a per-pound baseline cooking time in minutes derived from culinary standards and USDA safety guidelines. Denser or thicker cuts like pork shoulder carry higher factors than thin cuts like fish fillets. The dropdown uses 20 min/lb for beef roast, 25 for pork, 15 for chicken and 18 for turkey; real times vary with shape, bone and starting temperature, which is why a thermometer is the final check.
Why should I still use a meat thermometer if I have a cooking time calculator?
Cooking time formulas are estimates based on average conditions; actual results vary with refrigerator-cold vs. room-temperature meat, oven calibration, pan material, and bone placement. A meat thermometer measures the only variable that actually determines food safety and texture — internal temperature. The USDA recommends 165 °F for poultry, 145 °F for whole pork and beef, and 160 °F for ground meat. Use the calculator to plan your schedule and the thermometer to confirm doneness.