I debated whether I should post this because there are already at least five other guides at the time of this writing. But while D’Arcy’s was the most recent, a number of things had changed to where it still needed some tweaking to get right. I figured time is money and any time-saving tips are worthwhile. Hopefully this helps you at least for the next few versions of these platforms.

Note: While this gets you pretty darn close, you’ll still want to know a little about SQL, Drupal, and WordPress to customize this to fit your installation. Since Drupal was designed to be a CMS, not specific to blogging, there are multiple ways you could have configured the site to operate as a blog. Not knowing your setup ahead of time, I’m just going to show you mine. Here’s the SQL script to handle the import and conversion:

# Changelog

# 02.06.2009 - Updated by Mike Smullin http://www.mikesmullin.com/development/migrate-convert-import-drupal-5-to-wordpress-27/
# 05.15.2007 - Updated by D’Arcy Norman http://www.darcynorman.net/2007/05/15/how-to-migrate-from-drupal-5-to-wordpress-2/
# 05.19.2006 - Created by Dave Dash http://spindrop.us/2006/05/19/migrating-from-drupal-47-to-wordpress/

# This assumes that both wordpress and drupal are in separate databases. The wordpress database is called "wordpress" and the Drupal database is called "drupal"

# first, nuke previous content in wordpress database
TRUNCATE TABLE wordpress.wp_comments;
TRUNCATE TABLE wordpress.wp_links;
TRUNCATE TABLE wordpress.wp_postmeta;
TRUNCATE TABLE wordpress.wp_posts;
TRUNCATE TABLE wordpress.wp_term_relationships;
TRUNCATE TABLE wordpress.wp_term_taxonomy;
TRUNCATE TABLE wordpress.wp_terms;

# categories
INSERT INTO wordpress.wp_terms (term_id, `name`, slug, term_group)
SELECT
 d.tid, d.name, REPLACE(LOWER(d.name), ' ', '_'), 0
FROM drupal.term_data d
INNER JOIN drupal.term_hierarchy h
 USING(tid)
;

INSERT INTO wordpress.wp_term_taxonomy (term_id, taxonomy, description, parent)
SELECT
 d.tid `term_id`,
 'category' `taxonomy`,
 d.description `description`,
 h.parent `parent`
FROM drupal.term_data d
INNER JOIN drupal.term_hierarchy h
 USING(tid)
;

# posts; keeping private posts hidden
INSERT INTO wordpress.wp_posts (id, post_date, post_content, post_title, post_excerpt, post_name, post_modified, post_type, `post_status`)
SELECT DISTINCT
 n.nid `id`,
 FROM_UNIXTIME(n.created) `post_date`,
 r.body `post_content`,
 n.title `post_title`,
 r.teaser `post_excerpt`,
 IF(SUBSTR(a.dst, 11, 1) = '/', SUBSTR(a.dst, 12), a.dst) `post_name`,
 FROM_UNIXTIME(n.changed) `post_modified`,
 n.type `post_type`,
 IF(n.status = 1, 'publish', 'private') `post_status`
FROM drupal.node n
INNER JOIN drupal.node_revisions r
 USING(vid)
LEFT OUTER JOIN drupal.url_alias a
 ON a.src = CONCAT('node/', n.nid)
WHERE n.type IN ('post', 'page')
;

# post -> category relationships
INSERT INTO wordpress.wp_term_relationships (object_id, term_taxonomy_id)
SELECT nid, tid FROM drupal.term_node;

# category count updating
UPDATE wp_term_taxonomy tt
SET `count` = (
 SELECT COUNT(tr.object_id)
 FROM wp_term_relationships tr
 WHERE tr.term_taxonomy_id = tt.term_taxonomy_id
);

# comments; keeping unapproved comments hidden
INSERT INTO wordpress.wp_comments (comment_post_ID, comment_date, comment_content, comment_parent, comment_author, comment_author_email, comment_author_url, comment_approved)
SELECT nid, FROM_UNIXTIME(timestamp), comment, thread, name, mail, homepage, status FROM drupal.comments;

# update comments count on wp_posts table
UPDATE `wp_posts` SET `comment_count` = (SELECT COUNT(`comment_post_id`) FROM `wp_comments` WHERE `wp_posts`.`id` = `wp_comments`.`comment_post_id`);

# fix breaks in post content
UPDATE wordpress.wp_posts SET post_content = REPLACE(post_content, '', '');
# fix images in post content
UPDATE wordpress.wp_posts SET post_content = REPLACE(post_content, '"/files/', '"/wp-content/uploads/');

Things to be aware of:

• Always backup first, and don’t try this on a live server.
• Rename wordpress and drupal to the actual names of your databases.
• Remember to move your images from ./files into the ./wp-content/uploads directory. My Drupal ./files directory followed the same ./YYYY/MM/DD/filename URL structure for blog post images and attachments but yours may need to be manually renamed.
• You’ll likely need to use the WordPress Redirection plugin to preserve any link juice from your old permalink structure, where any changes occur.