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Roman Numeral Converter

Convert numbers and dates to Roman numerals.

Number → Roman

Roman → Number

Quick Reference

I = 1
V = 5
X = 10
L = 50
C = 100
D = 500
M = 1000

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Roman Numeral Converter — Numbers & Dates

Convert numbers to Roman numerals and back. Also includes a date converter for tattoos or special events.

How to use Roman Numeral Converter

  • Toggle the conversion logic — Choose between "Number to Roman" (e.g., converting 2026), "Roman to Number" (decoding MMXXVI), or "Date to Roman" formatting.
  • Enter your digits or numerals — The tool processes input in real time. It accepts standard Arabic numerals up to 3,999. It automatically validates Roman numeral input, warning you if you type an invalid sequence.
  • Format full dates — If you use the Date mode, it will convert month, day, and year simultaneously, separating them with a classic center dot (e.g., III · XV · MMXXVI for March 15, 2026).
  • Preview for tattoos or design — The tool displays the output in a classic, elegant Serif font to help you visualize how the numerals will look printed or tattooed. Click the Copy button to grab the text.

Features

  • Bidirectional — Number to Roman and Roman to Number.
  • Date mode — Convert dates (birthdays, anniversaries).

Frequently Asked Questions

What are the basic rules for writing Roman numerals?

The system uses seven letters: I (1), V (5), X (10), L (50), C (100), D (500), and M (1000). You write numbers left to right, largest to smallest, adding them together (e.g., XII = 10 + 1 + 1 = 12). The "Subtractive Principle" states that you cannot repeat a character more than three times (so 4 is IV, not IIII). Placing a smaller number before a larger one means subtraction (e.g., IX = 10 - 1 = 9).

How do I write 2026 in Roman numerals?

The year 2026 is written as **MMXXVI**. Breakdown: M = 1000. Next M = 1000 (total 2000). X = 10. Next X = 10 (total 20). VI is 6. Put it all together: MM (2000) + XX (20) + VI (6) = 2026.

Can Roman numerals represent zero or negative numbers?

No. The ancient Roman numeral system had no concept of zero and no symbol to represent it (they used the Latin word "nulla" if absolutely necessary). There is also no way to represent negative numbers or decimal fractions. The highest standard number you can write without using specialized modifications (like the vinculum overline) is 3,999 (MMMCMXCIX).