Question: how long to cook a whole chicken per kg?
Answer: Roast in the centre of a pre-heated oven, gas mark 5, 375°F (190°C), for 20 minutes per lb (450 g) plus 10-20 minutes extra – this will be 1 hour and 50 minutes to 2 hours for a 5 lb (2.25 kg) bird. Baste three times during the cooking time.