What is the tattoo date format?

Birth date mode outputs day, month, and year as separate Roman numerals — with dots, slashes, or stacked lines.

Standard Roman numerals without vinculum (overline) notation typically stop at MMMCMXCIX (3999).

Yes. This tool uses subtractive notation (IV, IX, XL, etc.) as is standard today.

Numeri Romani

Roman Numeral Converter

I, V, X, L, C, D, M — still legible two millennia later.

Convert Arabic numbers to Roman numerals (1–3999), parse Roman back to numbers, or format a birth date in tattoo-friendly styles.

Romans reckoned in I, V, X, L, C, D, M. Your birth date in numeri Romani is still inked on skin across the empire.

ModeNumber (1–3999)

Result

MMXXIV

What is the tattoo date format?: Birth date mode outputs day, month, and year as separate Roman numerals — with dots, slashes, or stacked lines.
Why only up to 3999?: Standard Roman numerals without vinculum (overline) notation typically stop at MMMCMXCIX (3999).
Is IV valid for 4?: Yes. This tool uses subtractive notation (IV, IX, XL, etc.) as is standard today.