How this roast chicken cooking time calculator works
This calculator estimates roasting time for a whole chicken using a practical kitchen rule: time based on weight, plus a fixed base time. It then adjusts the estimate if your oven temperature is higher or lower than standard roasting heat.
The baseline used is:
- Unstuffed chicken: 20 minutes per 500 g + 20 minutes
- Stuffed chicken: 25 minutes per 500 g + 25 minutes
Because ovens vary, this tool gives you a smart estimate, not an absolute guarantee. Always check doneness with a thermometer before serving.
Quick roast chicken timing guide
Unstuffed whole chicken
- 1.2 kg: about 70 minutes
- 1.5 kg: about 80 minutes
- 1.8 kg: about 90 minutes
- 2.0 kg: about 100 minutes
- 2.5 kg: about 120 minutes
Stuffed whole chicken
- 1.5 kg: about 100 minutes
- 1.8 kg: about 115 minutes
- 2.0 kg: about 125 minutes
- 2.5 kg: about 150 minutes
Best temperature for roast chicken
A classic roasting setup is:
- Conventional oven: 190°C (375°F)
- Fan oven: 170°C (340°F)
You can roast a bit hotter for crispier skin, but the margin for overcooking gets smaller. If roasting lower and slower, allow extra time and monitor internal temperature closely.
Food safety: the number that matters most
Cooking time is only an estimate. Safe doneness should be confirmed by temperature:
- Insert a meat thermometer into the thickest part of the breast and thigh (without touching bone).
- Aim for at least 75°C / 165°F in the deepest part of the meat.
- Juices should run clear, not pink.
After removing from the oven, rest the chicken for 10 to 20 minutes. Resting helps juices redistribute and improves texture.
Tips for juicy meat and crispy skin
Before roasting
- Pat the skin very dry with paper towel.
- Season generously with salt on the outside and in the cavity.
- Bring chicken closer to room temperature for 20 to 30 minutes before cooking.
During roasting
- Place breast side up on a rack or bed of vegetables.
- Avoid opening the oven too often.
- If skin browns too quickly, loosely tent with foil.
After roasting
- Rest before carving.
- Carve across the grain for tender slices.
- Save bones for stock.
Frequently asked questions
How long to roast chicken per pound?
A common rule is around 20 minutes per pound plus extra baseline time, but weight-only rules are rough. Use this calculator and then verify internal temperature.
Should I cover chicken with foil?
Usually no for most of the roast, because uncovered cooking helps the skin brown. If the skin darkens too early, cover loosely for the remainder.
Can I cook stuffing inside the chicken?
Yes, but it increases cooking time and adds food-safety complexity. Stuffing must also reach a safe internal temperature. Many cooks prefer baking stuffing separately.
What if my chicken is done early?
No problem. Rest it under loose foil. A whole chicken can hold heat surprisingly well for a short period before serving.