How to Export Outlook Contacts to Gmail

You can follow the instructions below to export a backup copy of your contacts from Outlook,  which can be imported into Gmail.  Note that this will result in duplicate records that will need to be merged or cleaned up.

    For Outlook 2013, on the File menu, click Open & Export, then Import and Export. (For Outlook 2010, Click File > Options > Advanced then, under Export, click Export)

    Click Export to a file, and then click Next.

    Click Comma Separated Values (Windows), and then click Next.

    In the folder list, click the Contacts folder, and then click Next.

    Browse to the folder where you want to save the contacts as a .csv file.

    Type a name for the exported file, and then click OK.

    Click Next.

    Click Finish.

For Outlook 2011, follow steps 1 through 3 on this page:

Some Outlook contacts may be in your local cache, and cannot be migrated, nor will they be part of an export following the above instructions.  Refer link for detailed info on cached contacts.