How Long to Cook a 1.3 kg Roast? Oven Temperature and Timing Guide

Learn how long to cook a 1.3 kg roast with oven temperature, timing, and internal temperature tips for perfect medium rare and well-done results.

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To cook a 1.3 kg roast, preheat your oven to 160°C (325°F). Place the roast in a roasting pan and season it according to your preference. Roast it in the oven for about 20 minutes per 450g/1lb, plus an additional 20 minutes. This equates to approximately 1 hour and 35 minutes. Always use a meat thermometer to ensure the internal temperature reaches 63°C (145°F) for medium rare. For a well-done roast, extend the cooking time until it reaches 71°C (160°F) internally.

FAQs & Answers

  1. What oven temperature is best for cooking a roast? A common oven temperature for roasting beef is 160°C (325°F), which allows the meat to cook evenly without drying out.
  2. How do I calculate cooking time for different roast weights? Cook the roast for about 20 minutes per 450g (1lb), plus an additional 20 minutes to achieve the desired doneness.
  3. What internal temperature should a roast reach for medium rare? For medium rare, the internal temperature of the roast should reach 63°C (145°F) as measured by a meat thermometer.
  4. How long should I cook a roast to make it well done? To cook a roast well done, continue roasting until the internal temperature reaches approximately 71°C (160°F).

Watch More

For more tips on roasting different cuts of meat and achieving perfect doneness, check out our guides on roasting times for various weights and using meat thermometers to ensure food safety and flavor.

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