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.. image:: https://img.shields.io/pypi/v/roman.svg :target: https://pypi.org/project/roman/ :alt: Current version on PyPI

.. image:: https://img.shields.io/pypi/pyversions/roman.svg :target: https://pypi.org/project/roman/ :alt: Supported Python versions

roman

Small helper library to convert arabic to roman numerals.

There are two ways to use this library.

1. Importing it into your application

.. code-block:: python

import roman

# to roman
number = int(input('> ')) # 10
print(roman.toRoman(number))

# from roman
number = input('> ') # X
print(roman.fromRoman(number))

1. roman CLI command

.. code-block:: bash

~$ roman 972
CMLXXII
# use the -r/--reverse to convert Roman numerals
~$ roman -r CMLXXII
972
# case insensitive
~$ roman -r cMlxxii
972

Change log

5.2 (2025-11-11)

• Add support for Python 3.14.

• Drop support for Python 3.9.

5.1 (2025-07-18)

• Hide undocumented special behavior for N behind method parameter. (#30 <https://github.com/zopefoundation/roman/issues/30>_)

5.0 (2025-01-15)

• Drop support for Python 3.7, 3.8.

• Add support for lower case roman numerals. (#22 <https://github.com/zopefoundation/roman/pull/22>_)

4.2 (2024-04-25)

• Remove overlooked mentions of the Python 2.1.1 license (#17 <https://github.com/zopefoundation/roman/issues/17>_)

• Add support for Python 3.12 and 3.13.

4.1 (2023-05-26)

• Change license to the Zope Public License (ZPL) version 2.1 (#15 <https://github.com/zopefoundation/roman/issues/15>_)

4.0 (2023-02-28)

• Add support for Python 3.10, 3.11.

• Drop support for Python 2.7, 3.5, 3.6.

3.3 (2020-07-12)

• added support for Python 3.9

• added CLI command roman with -r/--reverse to convert back from Roman

• added simple usage instructions

3.2 (2019-04-14)

• expanded test coverage

• Added support for 0 -> N (see https://en.wikipedia.org/wiki/Roman_numerals#Zero)

• Added support for Python 3.8

3.1 (2018-10-24)

• Added support for Python 3.7.

3.0 (2018-05-28)

• Added support for Python 3.5, 3.6 and PyPy3.

• Dropped support for Python 2.6 and 3.3.

2.0.0 (2013-02-25)

• Added Python 3.3 and PyPy support.

• Added tests.

1.4.0 (2009-07-23)

• Initial PyPI release.