Meat Roasting Time Calculator
Estimate roasting time from weight, rate and resting.
Results update as you type.
How it works
Timing a roast so it lands cooked-through but not dried out is far easier when you anchor it to weight, and this meat roasting time calculator turns a joint's weight, a per-kilogram cooking rate and a resting period into a clear schedule. You choose the rate that matches your meat and doneness, and the tool returns both the oven time and the total time including the all-important rest. This matters because a roast's cooking time is driven by how long heat takes to reach the centre, which grows with the size of the joint. Using minutes per kilogram gives a dependable estimate you can plan the rest of the meal around, from when the oven goes on to when the plates hit the table. A meat roasting time calculator also builds in resting time, which many cooks forget — the period off the heat where juices settle and carry-over cooking finishes the job. The calculation is straightforward: cooking time equals the weight in kilograms multiplied by your chosen minutes-per-kilogram rate, and the total adds the resting minutes on top. A two-kilogram joint at 40 minutes per kilogram needs about 80 minutes in the oven, plus a 15-minute rest for 95 minutes in all. Because the rate is adjustable, you can dial in beef, lamb, pork or poultry and your preferred doneness. Crucially, roasting time is a guide, not a guarantee — oven accuracy, bone and starting temperature all shift it — so always confirm doneness with a meat thermometer. Cooks planning a Sunday roast or a holiday centrepiece rely on a meat roasting time calculator to bring the meal together on time.
cooking time = weight × minutes per kg; total = cooking time + resting time
Roasting time scales with weight because heat has to travel from the surface to the centre of the joint, and a heavier piece has more mass to warm through. Multiplying the weight in kilograms by a per-kilogram rate gives the oven time; the rate you pick reflects the meat and how well done you want it. Adding the resting time gives the total to plan around, since a roast keeps cooking and its juices redistribute off the heat. Both parts are linear, so the schedule scales cleanly with the size of the joint.
Source:Standard roasting guidance
We review all our tools from time to time to ensure accuracy.
Worked example
How to use this calculator
- 1
Enter your values
Enter weight and minutes per kilogram.
- 2
Adjust the options
Adjust resting time if they apply — sensible defaults are already set.
- 3
Read your result
Cooking time updates instantly as you type — no button to press.
Frequently asked questions
How do I choose the minutes-per-kilogram rate?
The rate depends on the meat and how well done you want it. Roughly, beef and lamb for medium sit around 40 minutes per kilogram, pork nearer 55 to 65, and chicken about 45, though rates vary with recipe and oven temperature. Use a lower rate for rarer beef and a higher one for well-done. Because these are guides, treat the calculated time as a schedule and confirm the real doneness with a meat thermometer.
Why does the calculator include resting time?
Resting is a crucial step that many cooks overlook. After roasting, letting the meat sit allows the juices to redistribute and the internal temperature to climb a few more degrees through carry-over cooking, so the meat is juicier and easier to carve. This calculator adds your resting minutes to the cooking time to give a realistic total, helping you plan when to start so the roast is ready — rested and all — exactly when you want to serve.
Should I use a thermometer as well?
Yes, always for anything where safety or doneness matters. Time alone never guarantees a roast is properly cooked because ovens, cuts and starting temperatures vary. A meat thermometer inserted into the thickest part, away from bone, is the definitive test — for example around 75°C for poultry and lower targets for beef depending on doneness. Use the calculated time to plan and to know when to start checking, then let the thermometer make the final call.
Does bone-in or stuffed meat change the time?
It can. Bone conducts heat differently, so bone-in joints may cook a little faster near the bone but slower through dense muscle. Stuffing a bird adds significant time because the heat must also bring the filling up to a safe temperature, which slows the whole roast. In both cases, increase the minutes-per-kilogram rate or simply lean more heavily on a thermometer in the thickest section rather than trusting the time alone.
Should I take the meat out of the fridge first?
Letting a joint sit at room temperature for a while before roasting helps it cook more evenly, since a fridge-cold centre takes longer to warm through and can leave the outside overdone before the middle is ready. Many cooks rest larger roasts out of the fridge for 30 to 60 minutes beforehand, following food-safety limits. A colder starting point pushes the real cooking time up, so factor that in and verify with a thermometer.