Folgers, one year after expiration date, will require a little more to make the brew.
For example, if one used a tad less than a tbs per cup he would need to use a level tbs.
Rating the quality of fresh at 100% the out of date would be about 90%.
Hills Bros., that is packed in metal cans will last at least two extra years. (this may be because it is a little stronger)
All information is anecdotal no guarantees expressed or implied.