Yes, it converts to 2/1 BC.
When I saw the "1 BC/1 AD" in the link I hoped it would be that, because I long hoped to inaugurate a "how far forward can we go" thread on this subforum that would start at 1 AD, but it required someone to post a 1 AD coin

But nope, 2 BC is indeed correct. Augustus either way.
(1st century AD dated and/or single-year types aren't actually
that rare; we had a thread dedicated to those a few years back and managed to fill most of the century. It's further on that things get messy, with the 4th and especially 5th century very sparsely covered.)
(...Actually, a dedicated "post your ancient dated and single-year coins" would probably work very well even
without being limited to going forward by dates. Especially if there's also an occasionally updated count of what dates have already been found.
We'd need a firm definition of the appropriate time range though... that or just make multiple threads for smaller time ranges. 500-1 BC, 1-500 AD, 501-1000 AD, 1001-1500 AD should work? Dunno what to do with 1501-1600 though.)
(As a side note, I have several coins from Arados, but all of them are from the early period when the dates were written with that weird line-based system, and those thin lines don't preserve very well, so I'm not very confident of what the dates are.)
(...Sorry for the wall of text, by the way.)