Plus most metrics do not have a complicated formula. For instance, if you do Defects per Week, what would you think the formula might be?
Or tests per day, or time to test? All of these are pretty self explanatory, huh?
Success is the ability to go from one failure to another with no loss of enthusiasm.
~ Winston Churchill ~
As other have said use the Search facility here, and input "Software Testing Metrics" to give you a listing of the types of software testing metrics you might use. Also, the same search on Google will produce a lot of items to read over.