Tools / Roman Numeral Converter

Roman Numeral Converter

Convert between Roman numerals and Arabic numbers. Supports values from 1 to 3999 with instant bidirectional conversion.

6,200 AI Tokens Used
Feb 2, 2026 Created
mathconverter
Categories
Roman numeral will appear here

Roman Numeral Reference

I1
V5
X10
L50
C100
D500
M1000

Subtractive notation: IV=4, IX=9, XL=40, XC=90, CD=400, CM=900

Common Examples

1984MCMLXXXIV
2024MMXXIV
49XLIX
99XCIX
500D
3999MMMCMXCIX

How This Tool Was Built

This tool was created entirely by AI. Here's the exact prompt used to generate it:

Prompt Used 
Create a Roman Numeral Converter tool with these features:

1. Two modes: Number to Roman, Roman to Number
2. Number to Roman:
   - Input field for numbers 1-3999
   - Real-time conversion
   - Validation with error messages
3. Roman to Number:
   - Input field for Roman numerals
   - Case insensitive
   - Validate proper Roman numeral format
4. Copy result button
5. Reference table showing Roman numeral values (I, V, X, L, C, D, M)
6. Examples section with common conversions
7. Educational info about subtractive notation (IV, IX, etc.)

Make it elegant with purple as the accent color.
AI
Claude AI Model
#
6,200 Tokens Used
100%
AI-Generated Code Origin