Your iPhone is not your friend when you want to copy off all your contacts, but there are ways to get that data from iOS and into the more universal comma separated values format.

Clean up outdated and duplicate contact entries in Gmail or Outlook, then export the updated list so it's ready to sync with your iPhone or iPad via iTunes or iCloud.

Learn how to pack up and export your iCloud address book into a single file, which you can easily import to Gmail.