I'd make this a comment but don't have enough reputation. In response to naught101's comment to the chosen answer, the --progress option shows how many files have been transfered out of the total amount to transfer. I didn't realize this until looking at this post and looking at the output more carefully.

The 'to-check' stat shows how many files are left out of the total. This is of most use when rsync'ing to a new destination so you know all files will be fully copied.

From the man page:

      When [each] file transfer  finishes,  rsync  replaces  the
      progress line with a summary line that looks like this:

           1238099 100%  146.38kB/s    0:00:08  (xfer#5, to-check=169/396)

      In this example, the file was  1238099  bytes  long  in
      total,  the average rate of transfer for the whole file
      was 146.38 kilobytes per second over the 8 seconds that
      it took to complete, it was the 5th transfer of a regu-
      lar file during the current rsync  session,  and  there
      are 169 more files for the receiver to check (to see if
      they are up-to-date or not) remaining out  of  the  396
      total files in the file-list.

I'd make this a comment but don't have enough reputation. In response to naught101's comment to the chosen answer, the --progress option shows how many files have been transfered out of the total amount to transfer. I didn't realize this until looking at this post and looking at the output more carefully.

The 'to-check' stat shows how many files are left out of the total. This is of most use when rsync'ing to a new destination so you know all files will be fully copied.

From the man page:

When [each] file transfer  finishes,  rsync  replaces  the
progress line with a summary line that looks like this:

    1238099 100%  146.38kB/s    0:00:08  (xfer#5, to-check=169/396)

In this example, the file was  1238099  bytes  long  in
total,  the average rate of transfer for the whole file
was 146.38 kilobytes per second over the 8 seconds that
it took to complete, it was the 5th transfer of a regu-
lar file during the current rsync  session,  and  there
are 169 more files for the receiver to check (to see if
they are up-to-date or not) remaining out  of  the  396
total files in the file-list.