When can you use the compost you make when do you know its ready?

The compost will have an earthy smell and will not smell bad. It will have a very dark, almost black color, and it will look like good potting soil similar to what comes out of the bags you buy at the store. It should not have large pieces of debris left in it. It so, it must be turned over in the bin and given more time. See the related link below.