How long for cocaine to be out of your system to test clean?

I assume if you take the test and pass and also know how many days you've clean, then you can provide your own answer. Then again if you fail, you can provide the answer for how long is not long enough. Guess you know the best way to pass a drug test is just to be clean. On the other hand, if you knew much at all, you would know there are a variety of drug testing methods of which the cost is a factor in how sensitive the test is itself. There is no exact number of days. Each test is different. Some do not even test for cocaine. Maybe you should just tell the person testing you that you are a drug user and quit wasting everyone's time.