# Roman numerals **URL:** \ **Category:** Cecil's Columns/Staff Reports\ **Created:** [February 6, 2015, 4:41pm UTC](https://boards.straightdope.com/t/roman-numerals/711983 "2015-02-06T16:41:00Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![Viseguy](https://avatars.discourse-cdn.com/v4/letter/v/779978/32.png) [@Viseguy](https://boards.straightdope.com/u/Viseguy)\ **Post date:** [February 6, 2015, 4:41pm UTC](https://boards.straightdope.com/t/roman-numerals/711983/1 "2015-02-06T16:41:00Z")
I enjoyed SD Classic #1 (02/23/1990) on Roman numerals. No wonder Rome fell. This – the column, not the fall of Rome – got me searching for online Roman numeral conversion facilities. Google has one (e.g., “999 in roman numerals”), but it doesn’t handle numbers higher than 4999. Then I found this: > **[Convertor de numere indo-arabe în numere scrise cu cifre romane....](https://www.numere-romane.ro/index.php)** > > Învață cum se scriu numerele indo-arabe cu cifre romane (cu numerale romane): 1) Descompune numărul în subgrupuri de valoare pozițională, după ordin de mărime. 2) Convertește fiecare subgrup, scrie-l cu cifre, cu numerale romane. 3) Construiește... This courteous robot explains how it got its result, and has an upper limit of 999,999. It also appears to have the virtue of consistency in its method of calculation. (Proof of this theorem is left to others.) Cheers. ---
**Author:** ![domotorp](https://avatars.discourse-cdn.com/v4/letter/d/898d66/32.png) [@domotorp](https://boards.straightdope.com/u/domotorp)\ **Post date:** [February 10, 2015, 1:18pm UTC](https://boards.straightdope.com/t/roman-numerals/711983/2 "2015-02-10T13:18:26Z")
Funny that they apply the rule that (something) = 1000\*something for all, except M, for which the SD article contained the notation (I), consistent. Then I suppose this is like a number system - just put a () to multiply by 1000. ---
**Author:** ![Elendil\_s\_Heir](https://avatars.discourse-cdn.com/v4/letter/e/7cd45c/32.png) [@Elendil\_s\_Heir](https://boards.straightdope.com/u/Elendil_s_Heir)\ **Post date:** [February 10, 2015, 2:01pm UTC](https://boards.straightdope.com/t/roman-numerals/711983/3 "2015-02-10T14:01:43Z")
Cecil’s column in question: [What is the proper way to style Roman numerals for the 1990s? - The Straight Dope](http://www.straightdope.com/columns/read/1371/what-is-the-proper-way-to-style-roman-numerals-for-the-1990s) I remember in 2000, M&M Mars had some candy ads trumpeting “the year of MM”! ---
**Author:** ![Quartz](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/quartz/32/267_2.png) [@Quartz](https://boards.straightdope.com/u/Quartz)\ **Post date:** [February 10, 2015, 3:35pm UTC](https://boards.straightdope.com/t/roman-numerals/711983/4 "2015-02-10T15:35:30Z")
I was taught that the Romans put a bar over the top to multiply by 1,000. ---
**Author:** ![John\_W.Kennedy](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/john_w.kennedy/32/1031_2.png) [@John\_W.Kennedy](https://boards.straightdope.com/u/John_W.Kennedy)\ **Post date:** [February 11, 2015, 4:55am UTC](https://boards.straightdope.com/t/roman-numerals/711983/5 "2015-02-11T04:55:51Z")
The bar over the top was to get the system up into yet-larger numbers. ---
**Author:** ![qazwart](https://avatars.discourse-cdn.com/v4/letter/q/5fc32e/32.png) [@qazwart](https://boards.straightdope.com/u/qazwart)\ **Post date:** [February 12, 2015, 12:42am UTC](https://boards.straightdope.com/t/roman-numerals/711983/6 "2015-02-12T00:42:10Z")
The Rome Republic started in 509 BCE and the Empire was divided into two in 364. That’s over 850 years of Roman numerals. In fact, Roman numerals were used exclusively in Europe until Fibonacci introduced Arabic numerals to the Europeans in 1202. It would not surprise me if Roman Numeral evolved in their use and various ways of writing them came and went over time. I have a hunch that what we think is the _correct way_ to write Roman numerals was probably created in the Victorian era. ---
**Author:** ![Elendil\_s\_Heir](https://avatars.discourse-cdn.com/v4/letter/e/7cd45c/32.png) [@Elendil\_s\_Heir](https://boards.straightdope.com/u/Elendil_s_Heir)\ **Post date:** [February 21, 2015, 6:01am UTC](https://boards.straightdope.com/t/roman-numerals/711983/7 "2015-02-21T06:01:24Z")
This cartoon just came up on my _New Yorker_ page-a-day calendar: [http://imgc-cn.artprintimages.com/images/P-473-488-90/65/6543/6YX4100Z/posters/michael-maslin-you-can-tell-the-judge-why-you-were-doing-cx-in-an-xxv-new-yorker-cartoon.jpg](http://imgc-cn.artprintimages.com/images/P-473-488-90/65/6543/6YX4100Z/posters/michael-maslin-you-can-tell-the-judge-why-you-were-doing-cx-in-an-xxv-new-yorker-cartoon.jpg) ---
**Author:** ![florencetaylor](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/florencetaylor/32/7318_2.png) [@florencetaylor](https://boards.straightdope.com/u/florencetaylor)\ **Post date:** [February 24, 2015, 6:18am UTC](https://boards.straightdope.com/t/roman-numerals/711983/8 "2015-02-24T06:18:34Z")
The Rome Republic started in 509 BCE and the Empire was divided into two in 364. That’s over 850 years of Roman numerals.