Roast Cooking Time
Estimate oven time and target temperature for roast cuts.
About Roast Cooking Time
Roasting time scales by weight and cut, while the internal target temperature is chosen from the doneness setting. A roast's true doneness is internal temperature, so pairing time estimates with a pull temp prevents dry centers.
Formula
Roast Cooking Time
Cook = weight x (beef/prime rib 15, lamb 20, pork 25 min/lb); temp set by doneness
- target temp
- Where to pull the roast; it rises about 5-10 F while resting
Worked example
With the default values below, Roast Cooking Time returns Total Cook Time of 60. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Roastone of Beef roast, Prime rib, Pork loin, Lamb leg
- Beef roast
- Weightminimum 0.5 lb
- 4 lb
- Doneness to reachone of Rare 120 F, Medium-rare 130 F, Medium 140 F, Well 160 F
- Medium-rare 130 F
Results
- Total Cook Time
- 60 min
- Total Cook Time
- 1.00 h
- Target Internal Temp
- 130 F
Step by step
- 1Values used
- 2Roast Cooking Time
- 3Total Cook Time= 60 min
- 4Total Cook Time= 1.00 h
- 5Target Internal Temp= 130 F
Assumptions and limits
- The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is Roast Cooking Time calculated?
Cook = weight x (beef/prime rib 15, lamb 20, pork 25 min/lb); temp set by doneness Roasting time scales by weight and cut, while the internal target temperature is chosen from the doneness setting.
Why does Roast Cooking Time matter?
A roast's true doneness is internal temperature, so pairing time estimates with a pull temp prevents dry centers.
What values do I need to enter?
This calculator takes 3 inputs: Roast, Weight, Doneness to reach. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.