From reading at
Penzey's, each 1 gm is about 450-500 threads or 2 tsp whole or about 1/2 tsp ground. They also say that any ground that you buy is probably cut with tumeric. 1/2 g runs $7 or 8 for the threads. I'm making an order soon, I may just add some in. Most recipes I've seen call for 2 or 3 threads, maybe a few more, so it should go a long way.