There really is no exact answer to this question. You see, its not like a one-way street. There is conversion, to 1-test, then back to 1AD, then back to 1-test, etc, etc...as the compound comes into contact with 17HSD.
That said, we can look at what appears to be an effective dose of 1-andro...which is what I'm assuming you want to know when you ask conversion rate. Back in the day, I had great results at 300-400mg daily of the old ergo 1-andro-diol compound. The new AMS 1-andro (same as the ironmags stuff) gave me similar results at 400-600mg as the original 1AD.
Many ran the original 1AD at much higher dosages however (like 600mg daily). You'd likely want to run the new 1-androsterone products at 600-800mg daily to get similar effects to the high end 1AD users.