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Convert Roman numerals

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One would like to Roman numerals convert, a distinction is made between simple conversion and the so-called subtraction rule. We explain how it works. As an additional help for converting Roman numerals, there is also a converter that can be used to convert Numbers and digits let convert. There is also a practical infographic on the numbers and rules as well as recommended Roman numerals fonts.

What are Roman Numbers?

But let's start with the definition of Roman numerals. Here we go!

Roman numerals are the numerals of a numerical script that originated in Roman culture. This consists of the seven characters I, V, X, L, C, D and M. It is a so-called additive number font. So the value is calculated by adding up digits. However, there is a special feature in the form of Rules for the subtractive writing of numbers. In addition, there is no place value system for Roman numerals. The Romans could not do anything with the number "0" either.

The Detachment the Roman numerals through today's Arabic numerical system finally took place in the course of the late Middle Ages. Still, Roman numerals are very popular these days. The dials of clocks, the numbering of book chapters, the marking of buildings, tattoos, the spelling of titles and the representation on film posters common uses for Roman numerals represent.

Roman numerals converter and converter

The Roman Numbers Converter converts Roman numbers into normal (Arabic) numbers and vice versa. Simply enter the number or the characters in the form below and then click on "Convert". The Roman numerals converter then converts this if it is a number or a valid character string:


Roman Numbers Rules as a Practical Infographic

For the sake of simplicity, here's one first Roman numerals infographic. It contains the Values ​​of the characters as well as some simple rules to remember.

The infographic can of course be shared or inserted into websites. The following embed code is available for this. When sharing or embedding, please link to designerinaction.de as a source - thank you very much!

Embed code for the Roman numerals infographic

Convert Roman numerals

In the Roman characters, I stands for 1, V for 5, X for 10, L for 50, C for 100, D for 500 and M for 1000. The characters are written according to the value and then added. The largest value appears first. According to the Spelling rule of Roman numerals no more than three times be repeated. As a result, for example, “IIII” as a representation of the number 4 is invalid.

But how do you represent the value then? Here then comes the so-called Subtraction rule in the game. This means: a smaller value is placed in front of the larger value and subtracted from it. For example, the number 4 becomes the Roman number “IV” (5 minus 1). The following then result Rules for subtraction:

  • First: I only precedes V and X
  • Secondly: X only precedes L and C
  • Third: C only precedes D and M

Simplified examples for conversion:

The roman number for the value 1724 is for example MDCCXXIV. The calculation is then as follows: 1000 (M) + 500 (D) + 100 (C) + 100 (C) + 10 (X) + 10 (X) + 4 (IV).

Since the Romans do not know the number 0 in the spelling, it becomes the value 2001 the roman numeral MMI. The calculation method is then: 1000 (M) + 1000 (M) + 1 (I).

What is the greatest roman number?

The greatest Roman number is 3999 (MMMCMXCIX). This has to do with the fact that certain characters can only appear three times in a row or even only once. By the way, according to the current rules, everything that goes beyond this cannot be represented with Roman numerals.

Roman numerals 1-100 table

The Roman numerals from 1-100 can also be found here clearly in a table. Are included Roman numerals in upper and lower case (Uppercase and lowercase) and the corresponding Terms in Latin.

decimal numberRoman numeral (uppercase)Roman numeral (minuscule)Latin

Donkey bridges: memorize Roman numerals

Looking for a way to memorize Roman numerals? This is “very easy to do” in the truest sense of the word. The Roman numerals can be with the fingers of one hand notice. The number 1 stands for a finger or a line. The number 3 requires three fingers or strokes. The Roman number for 5 looks like a “V” and the hand consists of 5 fingers.

It continues with the basic sign 10. For this you need two full hands. To memorize, simply mirror the “V” in your mind. There is then an "X" for 10.

Only the characters L (50), C (100), D (500) and M (1,000) are missing. But luckily there is Donkey bridges to memorize the Roman numerals:

  • Let Caesar do that.
  • The girls camp in any number of camps.
  • I sell comics to X – people The Mouse.

The first letters of the first sentence stand for the numbers from 50 onwards. All Roman numerals are covered by the first letters of the second sentence.

Roman numerals font

Roman numerals were first in the so-called Capitalis monumentalis to see. This is a Monumental script from Roman antiquity. Which are also available as Lapidary writing The designated font (derived from the Latin "lapis" for "stone") consists exclusively of capitals (capital letters) and was mainly used for the design of inscriptions.

One of the best-known uses of the Roman numerals font was in the form of Inscriptions on the Trajan column in the 2nd century. The monument was built in honor of the Roman emperor Trajan (98–117 AD) on his forum in Rome.

In addition, the Capitalis monumentalis still today as a source of inspiration for fonts. Here are some fonts that are in the ancient Roman style. Roman numerals can be ideally represented with these fonts.

Ancient Roman style fonts


Font designer Carol Twombly designed the Trajan font in 1989 as part of her work at Adobe. The font family can also be considered one of the most significant designs of their career. The appearance of the letters is clearly inspired by the Capitalis monumentalis. The font can be used to represent Roman numerals.

Trajan is used in many logos and almost inflationary in movies such as Titanic, Star Wars, Lord of the Rings, The Mummy or A Beautiful Mind.

In any case, the group “Film posters typeset in Trajan” has made it their mission on flickr to collect film posters that use the Trajan font. The bottom line is that there are currently over 13,200 posters.

Trajan on MyFonts.com *


Meanwhile, the Cinzel font by Natanael Gama from Lisbon looks like a more playful variant of the Capitalis monumentalis. Like the Trajan, Cinzel also has elegant lines with which not only Roman numerals can be represented. There are also special characters that give the font additional character. A stylish font that can also be downloaded free of charge. Cinzel is also available on Google Fonts.

Download the Cinzel font for free


Russian font designer Denis Masharov presents his take on a classic and elegant font. The term “forum” also indicates a homage to the Trajan period and Roman antiquity. The creative shows further elaborations on the behance.net page about writing. Forum can also be downloaded for free from Google Fonts.

Download Forum font for free


Another interesting alternative is the Constantine font. The font from Dukom Design is available according to the pay-what-you-want principle and can accordingly be purchased from 0 dollars. In addition to the styles in regular and bold, there is also an outline version to download.

Download Constantine font

Beba's new one

Representing the many fonts that are used for so-called "Credits" on movie posters used, here comes the new Bebas. A narrow typeface with many cuts that does not look antique or monumental, but is still often used for Roman numerals. Bebas Neue is available free of charge. Very appealing alternatives can also be found in the form of the paid Trade Gothic * or Franklin Gothic *.

Download Bebas New