Library Home: Dewey Decimal Classification to Library of Congress Classification: DDC to LCC

Note about this Guide

This guide exists as a self-help reference resource. We are unable to provide any cataloging assistance or answer cataloging questions.

About this page

If you have a call number in the Dewey Decimal classification, but you are looking for a similar call number in the Library of Congress classification, use the links below.

Mapping Dewey Decimal numbers to Library of Congress numbers

Dewey Decimal vs. Library of Congress Table
An expanded table of DD to LC classifications created by Kilgore College.
Map a Dewey number to an LC number
The following table is provided by QuestionPoint.

Search by Title, Author, Subject Heading, or Standard Number

Search Worldcat.org
Search WorldCat for the book and click-through to library catalogs to see what call number they list. This method may prove more successful for some books than the LC catalog search.
Search the LC Catalog
Search by title of the work to find its entry in the LC Catalog in which you may find listed LC call numbers and DD class numbers. Not all books in the LC Catalog will have this information listed, and you may be unable to find recently published works.
http://classify.oclc.org/classify2
NOTE: Classify was discontinued on January 31, 2024. OCLC Cataloging and Metadata subscribers can use WorldShare Record Manager or the WorldCat Metadata API, available as part of the subscription, to perform similar searches to find classification numbers.