Question : Date formula in Excel

I have a user who is trying to find a formula for Excel where she types in a date that something is received, and excel will pull the date from the computer and tell you how long it's been since they got it.  I think I remember that excel could do something like this but i can't for the life of me seem to be able to figure out the answer.

Also, I was wondering if it would be possible to have a set date (like the day a warranty expires) and have a formula to tell you how many days you have left from the current date?

Answer : Date formula in Excel

Hi,

with the receipt date in A1 calculate the number of days since then with

=today()-A1

How many days unitl a certain date? With that date in A2

=A2-today()

hth