Originally Posted by
rudestuff
To answer the question you can't 'convert' to an FAA commercial or ATP but you can credit your flight hours and take the written and flight tests. Everything you need to know is in
part 61 subpart f (just Google the bold).
Correct - they are 2 separate systems (although you can get an FAA PPL off the back of your UK CAA one). Make sure if you are logging hours you differentiate between actual IMC and simply flying IFR.