For example:
"I have 2000 points - how much is that in real money?"
The easiest thing to do is pop into one of the stores and the staff will be happy to scan your card and tell you what the dollar value of your points is.
If that sounds like too much effort and you want to know NOW you can estimate that on average, points are worth between 2 and 5 cents, or approximately 2-5% of the purchase you made when you earned the points. So 2000 points are worth $40.
Most importantly
HAPPY SHOPPING!