How can I estimate cooking time for a brined and roasted turkey?
I've never roasted an entire turkey, but my grandmother followed Delia Smith's advice every year and it never failed us. Typically it worked at at around 15 - 20 minutes per lb of bird.


  
  Cooking times for other sizes of turkey: 
  
  
  8-10 lb (3.5-4.5 kg) – 30 minutes at the high temperature, then 2½-3
  hours at the lower temperature, then a final 30 minutes (uncovered) at
  gas mark 6, 400°F (200°C).  15-20 lb (6.75-9 kg) – 45 minutes at the
  high temperature, then 4-5 hours at the lower temperature, then a
  final 30 minutes (uncovered) at gas mark 6, 400°F (200°C).