Roman Numeral Converter
Convert between Roman numerals and numbers both ways — chapters, clocks, movie credits. Decode MCMXCIV as 1994 instantly — local math, free, no signup.
How to Use the Roman Numeral Converter
Similar Tools You Might Need
See allNumber Base Converter
Convert numbers between binary, octal, decimal, and hex with bitwise views. Read 0xFF as 255 instantly — local math, free, no signup.
Text ↔ Binary Converter
Convert between plain text and binary in both directions — encode text into its base-2 representation or decode binary strings back to readable text, byte by byte. Files are converted locally in your browser — nothing is uploaded.
JSON to XML
Converts JSON files to XML format — APIs, configuration files, and data exchange between web services to enterprise systems, SOAP APIs, document formatting, and legacy integration pipelines.
IPv4 Address Converter
Convert IPv4 addresses between dotted-decimal, hex, integer, and binary forms. Decode 2130706433 to 127.0.0.1 instantly — local math, free, no signup.
GSTIN Lookup
Checks any GSTIN format instantly — decodes state, embedded PAN, entity code, and check digit with Luhn mod-36 verification. Supports bulk file decode (up to 500) with CSV export for accounts teams.
Frequently Asked Questions
What is MCMXCIV?
1994 — M(1000) + CM(900) + XC(90) + IV(4). Subtractive pairs (IV, IX, XL, XC, CD, CM) trip up manual readers.
Valid range?
1–3999 standard (I to MMMCMXCIX); larger needs overline notation most tools skip. Clocks and chapters live comfortably inside. Type digits for number→numeral or letters for the reverse — detection is automatic, and validity is checked by round-trip (the numeral must re-encode exactly, so IIII and VV fail).
Validation too?
Yes — malformed numerals (IIII, VV) flag with the rule violated. Four repeats max, V/L/D never repeat.
Do numerals upload anywhere?
No — conversion runs locally in your browser. Nothing leaves your device.
Related Converter Tools
Last updated October 2026