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Modules to convert numbers to words. Easily extensible.

Project Description

num2words - Convert numbers to words in multiple languages

num2words is a library that converts numbers like 42 to words like forty-two. It supports multiple languages (English, French, Spanish, German and Lithuanian) and can even generate ordinal numbers like forty-second (altough this last feature is a bit buggy at the moment).

The project is hosted on


The easiest way to install num2words is to use pip:

pip install num2words

Otherwise, you can download the source package and then execute:

python install

The test suite in this library new, so it’s rather thin, but it can be ran with:

python test


There’s only one function to use:

>>> from num2words import num2words
>>> num2words(42)
>>> num2words(42, ordinal=True)
>>> num2words(42, lang='fr')

Besides the numerical argument, there’s two optional arguments.

ordinal: A boolean flag indicating to return an ordinal number instead of a cardinal one.

lang: The language in which to convert the number. Supported values are:

  • en (English, default)
  • ar (Arabic)
  • fr (French)
  • de (German)
  • es (Spanish)
  • lt (Lithuanian)
  • lv (Latvian)
  • en_GB (British English)
  • en_IN (Indian English)
  • no (Norwegian)
  • pl (Polish)
  • ru (Russian)
  • dk (Danish)
  • pt_BR (Brazilian Portuguese)
  • he (Hebrew)
  • it (Italian)

You can supply values like fr_FR, the code will be correctly interpreted. If you supply an unsupported language, NotImplementedError is raised. Therefore, if you want to call num2words with a fallback, you can do:

    return num2words(42, lang=mylang)
except NotImplementedError:
    return num2words(42, lang='en')


num2words is based on an old library, pynum2word created by Taro Ogawa in 2003. Unfortunately, the library stopped being maintained and the author can’t be reached. There was another developer, Marius Grigaitis, who in 2011 added Lithuanian support, but didn’t take over maintenance of the project.

I am thus basing myself on Marius Grigaitis’ improvements and re-publishing pynum2word as num2words.

Virgil Dupras, Savoir-faire Linux


Version 0.5.5 – 2017/07/02

  • Add Arabic localization (#72)
  • Add Spanish-Colombian and Spanish-Venezuelan localization (#67)
  • Add VietNam localization (#61)
  • Add Italian localization (#56, #59)
  • Improve Russian localization (#62)
  • Improve Polish localization (#58)

Version 0.5.4 – 2016/10/18

  • Tons of new languages!
  • Add Polish localization. (#23)
  • Add Swiss-French localization. (#38)
  • Add Russian localization. (#28, #46, #48)
  • Add Indonesian localization. (#29)
  • Add Norwegian localization. (#33)
  • Add Danish localization. (#40)
  • Add Brazilian localization. (#37, #47)
  • Improve German localization. (#25, #27, #49)
  • Improve Lithuanian localization. (#52)
  • Improve floating point spelling. (#24)

Version 0.5.3 – 2015/06/09

  • Fix packaging issues. (#21, #22)

Version 0.5.2 – 2015/01/23

  • Added Latvian localization. (#9)
  • Improved Spanish localization. (#10, #13, #14)
  • Improved Lithuanian localization. (#12)

Version 0.5.1 – 2014/03/14

  • Added Python 3 support with 2to3. (#3)
  • Fixed big numbers in spanish. (#2)
  • Fixed bugs in tanslation from 30 to 40 in spanish. (#4)
  • Fixed word joining in english. (#8)

Version 0.5.0 – 2013/05/28

  • Created num2words based on the old pynum2word project.
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num2words-0.5.5-py2.py3-none-any.whl (57.2 kB) Copy SHA256 Checksum SHA256 py2.py3 Wheel Jul 12, 2017
num2words-0.5.5.tar.gz (37.9 kB) Copy SHA256 Checksum SHA256 Source Jul 12, 2017

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