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How to cook whole roast chicken
Roast time scales with weight; the thigh is the last part to finish.
Times and temperatures
| Method | Temperature | Time | Notes |
|---|---|---|---|
| Oven | 190–200°C / 375–400°F | about 20 min per 500 g, plus 20 min | A 1.5 kg bird is roughly 1 hr 20; rest 15 min before carving. |
How to tell when it is done
Cook to 74°C / 165°F in the thickest part of the thigh, not touching bone. An instant-read thermometer in the thickest part is the surest check; the times above are a guide to plan around.
Other foods
Chicken breast
A lean cut that dries out if overcooked — cook to temperature, not to the clock.
Chicken thigh
More forgiving than breast; stays juicy and takes a little longer.
Salmon fillet
Quick to cook; done when it turns opaque and flakes with a fork.
White fish (cod)
Delicate and fast; overcooking makes it rubbery.
Steak
Doneness is all about internal temperature; rest it before cutting.
Pork chop
Modern advice is a little pink is fine once it reaches temperature.
A general cooking guide, not a food-safety guarantee. For meat, fish and eggs, use a thermometer and the safe temperatures above.
Source: Safe internal temperatures follow standard food-safety guidance (FoodSafety.gov / USDA). Times are general cooking guides. · checked 2026-09-04
Frequently asked questions
How long do you cook whole roast chicken?
Oven: about 20 min per 500 g, plus 20 min at 190–200°C / 375–400°F. Times vary with thickness and equipment, so check it is done.
What temperature should whole roast chicken reach?
Cook to 74°C / 165°F in the thickest part of the thigh, not touching bone.
Can I use an air fryer or oven instead?
Often yes — see the table above for each method's time and temperature. Air fryers usually run a little faster than a conventional oven.
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