Meat Roasting Time & Temperature Calculator
Meat roasting time calculator — choose beef, lamb, pork, chicken or turkey, enter the weight and doneness, and get the oven temperature, cook time, resting time and total, in kg or pounds. Based on standard roasting charts. Runs in your browser.
Meat Roasting Time & Temperature Calculator
How to Use the Meat Roasting Calculator
Pick the meat
Choose beef, lamb, pork, chicken or turkey.
Enter the weight
Type the joint’s weight in kilograms or pounds.
Choose doneness
Select rare, medium or well done (red meats); poultry is cooked through.
Read the plan
Get the oven temperature, cook time, rest time and total — then confirm with a thermometer.
Getting a Roast Right
A good roast is mostly a matter of timing, and timing a roast is more predictable than it feels when there is a table of hungry people waiting. The core relationship is simple: the time a joint needs scales with its weight, but not perfectly, because part of the cook is spent just bringing the surface and the oven up to heat regardless of size. That is why roasting charts — and this calculator — combine a per-kilogram rate with a flat allowance. The rate itself depends on two things: the kind of meat, since a dense beef joint behaves differently from a chicken, and how well done you want it, since a rare centre needs far less time than a well-done one. Enter the meat, its weight and your target doneness, and the tool returns the oven temperature, the cooking time, the rest, and the total from oven-on to carving.
The resting time is not padding — it is part of cooking the meat properly. As a joint roasts, heat drives the juices toward the centre; if you carve it straight away they run out onto the board and the slices are dry. A rest of ten to thirty minutes, depending on size, lets those juices settle back through the meat so it stays moist and carves cleanly. Resting also lets carry-over cooking finish the job: a large joint keeps rising a few degrees in the centre after it leaves the oven, which is why experienced cooks pull big roasts slightly before the target temperature and let the rest bring them home. The calculator builds an appropriate rest into the total for each meat.
Two honest caveats keep this useful rather than misleading. First, the figures assume a conventional, fan-off oven; with a fan or convection oven, drop the temperature by around twenty degrees Celsius and check a little earlier, because it cooks faster. Second, no timer can account for everything — the shape and thickness of the joint, whether it is on the bone, and how cold it was going in all shift the real time, and ovens are notoriously variable in their calibration. So use the calculated time to plan the meal and to know roughly when to start checking, but treat a meat thermometer as the final authority on doneness, particularly for poultry and pork where it is also a matter of food safety. Everything is computed in your browser from standard roasting charts, so nothing you enter leaves your device.
Weight sets the schedule, the thermometer sets the truth — and the rest is what turns a cooked joint into a good one.
10 Facts About Roasting
Roasting time scales with weight plus a flat allowance.
Rare, medium and well done need different times.
Resting meat lets the juices redistribute.
A fan (convection) oven cooks faster — lower it ~20°C.
Bone-in joints cook a little differently than boneless.
Starting from fridge-cold adds time.
Poultry must always be cooked thoroughly (no rare).
A meat thermometer is the only reliable doneness test.
Larger joints carry more carry-over cooking while resting.
This calculator runs in your browser — nothing is uploaded.
Frequently Asked Questions
- The tool uses standard roasting charts: a number of minutes per kilogram that depends on the meat and how well done you want it, multiplied by the joint’s weight, plus a flat allowance that covers the initial heat-up. It then adds a resting period to give the total time from oven-on to carving.
- A rare roast only needs the centre brought to a relatively low temperature, while a well-done one must reach a higher core temperature throughout, which takes longer. For red meats the calculator offers rare, medium and well-done rates; poultry is always cooked through, so only a fully-cooked option is given.
- During cooking the juices are driven toward the centre; resting lets them redistribute through the joint so it carves cleanly and stays moist rather than spilling onto the board. Resting also allows carry-over cooking, where the residual heat continues to raise the internal temperature by a few degrees, which is why you pull large joints slightly early.
- The temperatures and times are based on a conventional (fan-off) oven. If you use a fan or convection oven, lower the temperature by about 20°C and expect it to cook a little faster, so check earlier. The principle is the same; only the exact numbers shift.
- Yes. Switch the unit to pounds and enter the weight as you bought it; the tool converts internally to kilograms for the calculation. The times and temperatures are identical regardless of the unit you enter the weight in.
- It is a reliable guide, but several things shift the real time: the shape and thickness of the joint, whether it is bone-in, how cold it was when it went in, and your particular oven’s calibration. Use the calculated time to plan your meal, and confirm doneness near the end with a thermometer rather than relying on the clock alone.
- Letting a joint sit out of the fridge for a while before roasting helps it cook more evenly and closer to the chart times, because it does not have to spend the first part of the cook just warming through. If you roast it straight from the fridge, add a little extra time and check the core temperature.
- As a general guide, red meat is around 50–52°C for rare, 57–60°C for medium and 68–71°C for well done, while poultry should reach at least 74°C in the thickest part. These are the figures a thermometer confirms; this tool times you to roughly the right window, but the thermometer is the final word, especially for food safety with poultry and pork.
- A roast does not cook in strict proportion to its weight, because some of the time is spent simply bringing the surface and oven up to temperature regardless of size. The flat allowance — a fixed number of extra minutes — accounts for that initial phase, which is why a small joint still needs a sensible minimum time.
- Completely free, with no account or usage limit. It runs entirely in your browser, collects no data, and works offline once the page has loaded.
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