Convert a number from 1 to 3999 into Roman numerals, or paste a numeral such as XIV to get 14.
Overview
Roman numeral converter for numbers and Roman numerals. Turn 14 into XIV or XIV into 14. Free in your browser, from 1 to 3999. Free in your browser on Case…
What this page covers
There is no Roman zero. Unicode numerals such as ⅰ are not the same as ASCII I, V, and X.
Quick answer
Roman numeral converter for numbers and Roman numerals. Turn 14 into XIV or XIV into 14. Free in your browser, from 1 to 3999. Free in your browser on Case… Use it in a browser with no account required, then review the output before publishing or shipping.
Numbers to Roman numerals and back
Type 14 to get XIV, or type XIV to get 14. The range is 1 through 3999. Standard subtractive forms are used: IV, IX, XL, XC, CD, and CM. IIII is not accepted.
Dates stay on the date page
A year or a full date such as 2026-08-29 belongs on the Roman numeral date converter. This page is for a single integer or a single numeral.
What this does not convert
There is no Roman zero. Unicode numerals such as ⅰ are not the same as ASCII I, V, and X. Number to Words spells a number in English. A1Z26 is a letter cipher.
How to use this tool
- Open Roman Numeral Converter in a modern browser.
- Paste or type your text, code, list, or value into the input area.
- Review the output, then copy or download the result for your workflow.
Getting started
Convert a number from 1 to 3999 into Roman numerals, or paste a numeral such as XIV to get 14.
Topics this page helps with
People usually land here when searching for roman numeral converter, numbers to roman numerals, roman numerals to numbers, XIV. Roman Numeral Converter is designed for quick copy-paste workflows: paste input, review the preview, then copy or download the result.
Privacy and local processing
Roman Numeral Converter runs in your browser on Case Modify. Typical conversions do not upload your pasted text to our servers for processing.
You still share data with your browser vendor and network as with any website; see our privacy policy for analytics and ads. When you work with secrets, credentials, or personal data, review the output locally before you publish or send it.
Details: privacy policy.
Before you publish
Unicode styling, formatted code, and converted units can look correct in the preview but fail in the target app because of font support, line breaks, or platform limits.
Test a short sample in the destination (bio field, IDE, CMS, or spreadsheet) before you paste a long block.
Workflow tips: how Case Modify works, documentation hub.
Limits to keep in mind
Free browser utilities excel at quick edits, classroom exercises, and copy-paste formatting. They are not a replacement for licensed design software, production build pipelines, or compliance review.
When a platform rejects styled Unicode, fall back to plain ASCII from a case converter or remove formatting before you submit final copy.
Related pages on Case Modify
Roman Numeral Dates — Convert numbers and dates into Roman numerals (I, IV, MCMXCIX).
Number to Words — Convert numbers into written words using international or Indian numbering.
Binary Translator — Encode text as binary or decode binary back to text.
A1Z26 Cipher — Encode or decode the A1Z26 cipher (A=1 … Z=26).
Frequently asked questions
Why is 4 written as IV not IIII?
Standard subtractive notation uses IV. Some clock faces still use IIII. This converter follows the textbook form and will not decode IIII.
Can I convert Roman numerals back to digits?
Yes. Paste a valid sequence of I, V, X, L, C, D, and M. XIV becomes 14. MCMXCIX becomes 1999.
Does it support Unicode Ⅿ or Ⅰ?
No. Type ASCII letters I, V, X, L, C, D, and M.
Related Tools
Roman Numeral Dates: Convert numbers and dates into Roman numerals (I, IV, MCMXCIX).
Number to Words: Convert numbers into written words using international or Indian numbering.
Binary Translator: Encode text as binary or decode binary back to text.
A1Z26 Cipher: Encode or decode the A1Z26 cipher (A=1 … Z=26).