There are approximately 37 miracles performed by Jesus, recorded in the New Testament. I say approximately, because occasionally it can be a little tricky to determine if the different gospel accounts are referring to the same or a different miracle.
Of course, Jesus would have performed other miracles not recorded, as we read in John 21:25:
Now there are also many other things that Jesus did. Were every one of them to be written, I suppose that the world itself could not contain the books that would be written.