About Dewey Number

Dewey Number is an independently maintained project for finding and understanding Dewey Decimal numbers.

It brings together public catalogue searches, source and edition details, and printable learning materials.

Check the source behind a number

Results include references to their source records so readers can check the information. Catalogue coverage varies, and a library’s local shelf mark may differ from the number shown here.

Read how sources, editions and lookup limits are handled before using a result.

Questions and corrections

Questions, corrections, and suggestions are welcome at hello@deweynumber.com.