There isn't one. Word only comes with a WordPerfect 6.x for Windows
converter. WP6 thru WP12 all share the same basic file format, except that
features introduced in newer versions are not supported by the converter. If
you have access to WP10, you can use it to "save as" to a Rich Text Format
(.rtf) or Word (.doc) file, both of which can be opened in Word 2002.