Roman Numeral Converter
// Convert between Roman numerals and decimal numbers
#About Roman Numeral Converter
Free online Roman numeral converter. Convert decimal numbers to Roman numerals and Roman numerals to decimal numbers instantly. This tool runs entirely in your browser — your data is never sent to a server. Just paste your input, get instant results, and copy with one click. No sign-up or installation required.
#FAQ
How do Roman numerals work? ▾
Roman numerals use letters I(1), V(5), X(10), L(50), C(100), D(500), and M(1000). When a smaller numeral precedes a larger one, it is subtracted (e.g., IV=4). Otherwise, values are added (e.g., VI=6).
What is the largest number in Roman numerals? ▾
Standard Roman numerals can represent numbers up to 3,999 (MMMCMXCIX). Larger numbers historically used a bar notation (vinculum) to multiply by 1,000.
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<iframe src="https://www.browserutils.dev/embed/roman-numeral-converter" width="100%" height="500" frameborder="0" title="Roman Numeral Converter"></iframe>