Roman Numeral Converter

Turn any number into Roman numerals instantly — and convert Roman numerals back to numbers.

Type a number and watch it become Roman numerals as you go. Switch direction to read any Roman numeral as a regular number. A dedicated Date mode turns birthdays and anniversaries into elegant Roman numeral dates — perfect for tattoos, engravings, and gifts.

WHAT YOU CAN DO:

• Number to Roman — Enter 1 to 3,999,999. Large numbers use the classic overline (vinculum) notation.
• Roman to Number — Type Roman numerals and get the value at once. Invalid input is flagged clearly.
• Date mode — Pick a date, choose the format (D·M·Y, M·D·Y, Y·M·D) and separator. Great for tattoo and anniversary designs.
• Tap to copy — Tap the result or use the Copy button. Share anywhere in one tap.
• History — Your recent conversions are saved so you can revisit and reuse them.
• Quick reference — A handy chart of I, V, X, L, C, D, M plus this year in Roman numerals.

Clean, distraction-light design with light and dark themes. Works fully offline — no account, no sign-up.

Whether you're designing a Roman numeral tattoo, decoding a clock face, reading movie copyright years, or numbering an event, this converter gets it right every time.