It depends on your self tolerance in gambling,
You can't actually compute how much can you lose, especially if you are an avid gambling player.
If you want to regulate your money and want to know every penny that comes out of your pocket, then it is recommended that you set an amount to put at stake every week or month.
In that way you can compute how much you can lose.
You can lose up to the last centavo of your money if you will not stop gambling even if you have already been losing big, the control is really very important and that is to minimize our loses and to get the right entertainment in gambling, excessive gambling can never do good.