Free Roman Numeral Converter
Turn a number into Roman numerals and any numeral back into a number, from 1 to 3,999,999. Type in either box and the other fills in as you go. It is two-way, live, and it all runs in your browser.
Any whole number from 1 to 3,999,999.
2,026 in Roman numerals
Try a value
The seven symbols
Convert in four steps.
No convert button, no page reload and no upload. Type a number or a numeral and the other side appears as you type.
Type a number or a numeral
Enter a whole number in one box, or a Roman numeral in the other. Whichever you type, the other side fills in as you go.
Read it both ways
See the number spelled out in Roman symbols, and any numeral you enter turned back into a plain number, with the value confirmed.
Go past 3,999
For larger values the tool adds the vinculum, an overline that multiplies a numeral by a thousand, so it keeps working all the way to 3,999,999.
Copy and use it
Copy the numeral in a tap for a tattoo, a title, a date or a design. It all runs in your browser, so nothing is sent anywhere.
Seven letters, every number.
Every Roman numeral is built from these seven symbols, placed largest to smallest, with a smaller letter before a larger one meaning subtract, as in IV for four.
Common numbers at a glance.
The ones and tens, the key hundreds, the round thousands and a few recent years, so you can check an answer in a second.
From tattoos to titles, sorted.
Dates for tattoos and gifts
Turn a birthday, wedding or anniversary into a clean row of numerals for a tattoo, an engraving or a keepsake, with the value checked before it goes on for good.
Titles and chapters
Number the parts of a book, a film sequel, a Super Bowl, a monarch or a chapter heading the classic way, without second-guessing the letters.
Homework and revision
Check a Roman numerals worksheet, learn how the subtractive pairs like IV and IX work, and see the answer built up symbol by symbol.
Clock and watch faces
Lay out the hours for a clock face or a watch design, where four is often shown as IIII, and read any hour back to a number.
Copyright and credits
Read or write the year in a film credit, a cornerstone or a copyright line, where dates are often set in Roman numerals.
Design and typography
Set a number as numerals for a logo, a poster or a monogram, then copy it straight into your design tool.
Software that gets the details right?
Converting a numeral is a small thing. Building a product that reads, formats and validates data cleanly, every time and everywhere it is shown, is a bigger one. That is the kind of software we build at Techliphant, shaped around how your business actually works.
Common questions.
Type the number into the number box and read the numeral that appears next to it. The tool builds the numeral from the seven Roman letters, largest value first, using the subtractive pairs like IV for four and IX for nine where they belong. Copy the result in a tap.
Type the numeral into the Roman box, in upper or lower case, and the plain number appears alongside it. The tool checks that the numeral is well formed as you type, so if something is off it tells you rather than guessing.
They are I for one, V for five, X for ten, L for fifty, C for one hundred, D for five hundred and M for one thousand. Every Roman numeral is spelled out of these seven letters, placed largest to smallest, with a smaller letter before a larger one meaning subtract, as in IV for four.
Standard Roman numerals never repeat a letter four times in a row. Instead a smaller letter is placed before a larger one to mean subtract, so four is IV, nine is IX, forty is XL and ninety is XC. This tool follows that standard form. Clock faces are the common exception, where four is often shown as IIII for balance.
It converts every whole number from 1 to 3,999,999. Values from 1 to 3,999 use the plain letters. Above that, the tool uses the vinculum, an overline over a numeral that multiplies it by a thousand, which is how the Romans wrote large numbers.
The vinculum is a line drawn over one or more numerals to multiply their value by a thousand. For example, a V with a bar over it is five thousand, and an X with a bar is ten thousand. The tool shows the bar over the right part of the numeral, and you can type it back in using round brackets around the thousands part.
No. The Roman system has no symbol for zero, and it has no way to write negative numbers or fractions of a whole in the everyday letters. That is why this converter starts at 1. If you enter zero or a negative number it will let you know it is out of range.
Yes. Type mmxxvi or MMXXVI and you get the same answer. The tool reads the letters without minding the case, then shows the numeral back in the usual upper case form.
2026 is MMXXVI: two M for two thousand, two X for twenty, a V for five and an I for one. Type any year into the number box to see it laid out the same way, which is handy for dates on tattoos, gifts, credits and cornerstones.
Yes. It is free with no sign-up, and it runs entirely in your browser. Nothing you type is sent to a server or stored anywhere, so it keeps working even if your connection drops.
Private by design: this converter runs entirely in your browser. Every conversion happens on your own device in JavaScript, so nothing you type is uploaded to a server or stored anywhere. It keeps working even if your connection drops.
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