What is my personal injury case worth ?

It is impossible to answer your question with the limited information you have provided. First, how did the accident  happen?  What did you slip on?  Do you know how long the object had been on the floor?  Was the object open & obvious?  All these questions and more will help to determine if Wal-Mart was liable for the object on the floor. If they are not liable then you likely don't have a case.  Did Wal-Mart know about the object on the floor or had it been there long enough that they should have known about it - that is probably the key here.  If Wal-Mart is liable, then to determine the "worth" of your case - well there is really no formula.  Usually it is the cost of all your medical bills plus lost wages plus any estimated future medicals and then add some in for pain and suffering, etc.  There really is no formula (that I am aware of anyways).  However, I would recommend that you actually consult with an attorney prior to accepting any settlement from Wal-Mart because once you settle, that's it.  You are bound by the settlement and will have released any future claims against Wal-Mart, even if you later determine that you have more injuries or will have more future medicals.  Best of luck. NOTE:  This response is general in nature and should not be considered legal advice.  No attorney-client relationship exists or is formed by this response.