Chicken is the one dish you cannot rush or fudge, because it has to be cooked through every single time. A whole bird takes roughly 1 hour 20 to 2 hours 30 depending on its weight, and these times come from Gordon Ramsay’s own roast chicken recipes.
His doneness rule is the safe one, and it is the only one that counts. Pierce the thickest part of the thigh, and the juices must run clear. In his Ultimate Cookery Course he roasts the bird until “the juices from the thigh run clear.” Never serve chicken pink.
He roasts in two stages, and that is the bit most people miss. Start hot at 200°C to crisp and colour the skin, then drop to 180°C to cook it through gently, so the skin goes golden without the breast drying out.
The quick answer
A whole chicken roasts at 190°C (375°F) for about 20 minutes per 500g plus 20 minutes. That is roughly 1 hour 20 for a 3.5 lb bird, up to 2 hours 30 for a 7 lb one. It is done at 75°C (165°F) in the thigh, or when the juices run clear, then rest it 15 minutes.
Whole roast chicken cooking times by weight
At 190°C (375°F). The weight gives you the time, but the thigh test is the proof, so always check before you carve.
| Weight | Time at 190°C/375°F | Check |
|---|---|---|
| 3.5 lb / 1.6 kg | 1 hr 20 | thigh juices run clear, 75°C |
| 4 lb / 1.8 kg | 1 hr 30 | thigh juices run clear, 75°C |
| 4.5 lb / 2.0 kg | 1 hr 40 | thigh juices run clear, 75°C |
| 5 lb / 2.25 kg | 1 hr 50 | thigh juices run clear, 75°C |
| 6 lb / 2.7 kg | 2 hr 10 | thigh juices run clear, 75°C |
| 7 lb / 3.2 kg | 2 hr 30 | thigh juices run clear, 75°C |
Chicken cooking times by cut
Boneless cooks fast, bone-in needs longer. All at 200°C (400°F), all done at 75°C (165°F).
| Cut | Time at 200°C/400°F | Note |
|---|---|---|
| Breast, boneless | 18-20 min | rest 5 min so it stays juicy |
| Thigh, bone-in | 35-40 min | dark meat is best a little past 75°C, around 82°C |
| Drumstick | 35-40 min | turn once for even colour |
| Wings | 35-40 min | high heat for crisp skin, see chicken wings |
| Tenders / strips | 15-18 min | thin, so check early, see chicken tenders |
Chicken cooking times by method
| Method | Time | Note |
|---|---|---|
| Roast, oven | see weight chart | his two-stage method → roast chicken |
| Grill / BBQ, pieces | 30-40 min, turning | medium heat, not fierce, or it chars raw |
| Pan, breast or pieces | 6-8 min a side | → pan-fried chicken |
| Air fryer, pieces | 18-22 min at 180°C/360°F | turn halfway, modern method |
| Slow cooker, whole | 4-5 hr high, 7-8 hr low | no liquid needed, modern method |
| Instant pot, whole | 25-30 min plus natural release | modern method |
| Fried, pieces | 12-15 min in 170°C oil | → fried chicken |
| Spatchcock, whole | about 45 min at 200°C/400°F | flattened, so it cooks faster |
Where these times come from
I have not made these up. The two-stage roast, hot to crisp then lower to cook through, is from Gordon’s Ultimate Home Cooking, where he roasts at 200°C then drops to 180°C for 1¼ to 1½ hours. The thigh-juices-run-clear test and the final blast at 200°C are from his Ultimate Cookery Course. The per-pound figures are the standard safe roasting rule rather than a number he wrote, since his books give per-pound timings for beef and lamb but not whole chicken. Slow cooker, instant pot and air fryer are modern methods his books predate, so those are flagged as standard, not his.
FAQs
What temperature should chicken be cooked to?
Chicken is safely cooked at 75°C (165°F) in the thickest part, away from the bone. If you have no thermometer, use Gordon’s test: pierce the thigh and check the juices run clear, not pink. Dark meat like thighs and legs is actually nicer taken a little further, to around 82°C, where it turns tender rather than tight.
How long do you roast a whole chicken per pound?
About 20 minutes per 500g plus an extra 20 minutes, at 190°C (375°F). So a 5 lb bird needs roughly 1 hour 50. Weight only gets you close, though, so always finish on the thigh test rather than the clock, because a fan oven or a cold bird from the fridge will shift the timing.
How long do you cook chicken at 350°F versus 400°F?
At 350°F (180°C) a whole bird is gentler and slower, which is the stage Gordon uses to cook it through. At 400°F (200°C) it cooks faster and the skin crisps harder, which is how he starts and finishes the bird. Pieces at 400°F take 18 to 40 minutes depending on the cut.
How do you know chicken is done without a thermometer?
Pierce the thickest part of the thigh with a skewer and watch the juices: clear means done, pink means back in the oven. The leg should also feel loose and wobble in its socket. These are the checks Gordon uses in his books, and they are more reliable than time alone.
How long does a whole chicken take in a slow cooker?
Around 4 to 5 hours on high or 7 to 8 hours on low, with no added liquid, since the bird releases plenty. The skin will not crisp, so blast it under a hot grill for a few minutes at the end if you want colour. This is a modern method, not one from his books, so I have flagged it honestly.
How long do you grill or barbecue chicken?
Bone-in pieces take 30 to 40 minutes over medium heat, turned regularly. The mistake is fierce direct heat, which chars the outside while the inside stays raw. Move the pieces to a cooler part of the grill to finish, and check the thigh juices run clear before serving.
