---
title: "Roman Numeral Converter — Instant Bidirectional 1–3999"
description: "Convert between Arabic numbers and Roman numerals instantly. Enter a number (1–3999) or Roman numerals to convert bidirectionally. Includes common examples and historical context."
url: "https://worldcalculators.org/calculators/roman-numerals/"
canonical: "https://worldcalculators.org/calculators/roman-numerals/"
---

# Roman Numeral Converter

Convert between Arabic numbers and Roman numerals instantly. Enter a number (1–3999) or Roman numerals to convert bidirectionally. Includes common examples and historical context.

## Quick answer

2025 = MMXXV. The 7 symbols: I=1, V=5, X=10, L=50, C=100, D=500, M=1000. Subtraction rules: IV=4, IX=9, XL=40, XC=90, CD=400, CM=900. The system covers 1–3,999; there is no Roman numeral for zero.

Source: https://worldcalculators.org/calculators/roman-numerals/
Markdown mirror of the HTML page. Prefer this URL for RAG; the interactive calculator still lives on the HTML page.