Roman Numerals and Converter

Convert any number to Roman numerals instantly — perfect for tattoos, dates, years, homework and clock faces. Learn the rules, take a quiz, and copy with a single tap.

Roman Numerals is the complete, beautifully designed toolkit for reading, writing and understanding Roman numerals — whether you need a quick conversion, help with a tattoo, or a way to finally learn the rules.

CONVERT INSTANTLY • Turn any number into Roman numerals, and any numeral back into a number — live, as you type. • Full range from 1 all the way to 3,999,999 using authentic vinculum (overline) notation for large numbers. • See exactly how each numeral breaks down, e.g. MCMXCIV = M + CM + XC + IV, with every additive and subtractive group explained. • Copy any result with a single tap.

PERFECT FOR TATTOOS, DATES & GIFTS • Convert a full date into Roman numerals — ideal for tattoos, rings, engravings and anniversary gifts. • Turn birth years, wedding years and copyright dates into elegant numerals. • Choose your own separators and day/month order.

LEARN & PRACTICE • A clear, friendly guide to the seven symbols (I V X L C D M) and every rule — additive, subtractive, repetition and the vinculum. • A short, accurate history of where Roman numerals came from. • Test yourself with a built-in quiz across four difficulty levels and track your best streak.

HANDY TOOLS • A Roman-numeral clock face, including the classic IIII convention watchmakers use. • Add and subtract directly in Roman numerals, with the working shown step by step. • A fully searchable reference chart — 1 to 100, tens, hundreds, thousands and notable years.

DESIGNED WITH CARE • A premium, inscriptional look inspired by carved stone and gold. • Light and dark mode, Dynamic Type and full VoiceOver support. • Available in 24 languages. • No account, no sign-up, no clutter.

Whether you are decoding a movie’s copyright year, planning a tattoo, helping with homework or just curious, Roman Numerals makes it effortless.

Download now and convert, learn and create with confidence.