Convert between Arabic Numbers & Roman Numerals Please enter a number 1 – 4999 or a Roman numeral I – MMMMCMXCIX   M: 1000    D: 500    C: 100 L: 50    X: 10    V: 5    I: 1

Roman Numeral and
Date Conversion
with Roman Calculator
& Roman Numerals Test

©MCMXCIX Stephanus Gibbs, Sarnia InsulÆ

 

Date Conversion is the date in the Gregorian calendar; is the date in the Gregorian calendar, in Latin; is the date in the Julian calendar; is the date in the Julian calendar, in Latin; is the date in the Julian calendar, Roman style.   JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember   «—  You can enter a date in the Gregorian   or in the  Julian   calendar,     You can also use this to determine the day of the week for any Gregorian or Julian date ... e.g. At Pompeii, Vesuvius eruption of  Tuesday, 24th August 79; DIES MARTIS A.D. IX KAL. SEP. DCCCXXXII A.U.C.

	Roman Calculator   Valid input is I – MMMMCMXCIX (1–4999). Results <–4999 or >4999,  or invalid Roman input, will show error. Press = twice to clear. A result of zero is shown by a dot.     Divisions are rounded to the nearest integer.
	Roman Numerals Test Can you score X out of X ? Please enter the equivalent of the above numeral or number in the space below

Nota Bene

1. Gregorian calendar input before 15th October 1582 or after 30th January 4247 is not valid.  There was wide variation in the date of adoption of the Gregorian calendar.  For example, in Great Britain and colonies, the Julian date Wednesday 2nd September 1752 Old Style was followed the next day by the Gregorian date Thursday 14th September 1752.

2. Julian calendar input before 1st March 4 or after 31st December 4246 is not valid.  The conversion assumes that Julian years began on 1st January, but in many countries this was not the case, with New Year's Day falling on some other date, so users should allow for this where necessary.  For example, in England the last day of 1750, Sunday 24th March 1750 Old Style was followed by the first day of 1751, Lady Day, Monday 25th March 1751 Old Style.

3. For further information, see WikipediA at Roman numeral, Julian calendar, Gregorian calendar, and Old Style and New Style dates.

4. To make use of this conversion page without going on line, use your browser to SAVE [Ctrl–S] the page as a file on your hard disk, then OPEN [Ctrl–O] the disk file and BOOKMARK [Ctrl–D].

5. I welcome links to this page; Google has a list of pages which link here.  Please do not rip off this material to your webspace.  This page validates to XHTML and CSS standards.  Please report problems to Steven Gibbs.

 

"Just thought you'd be interested to know I aced my test on Roman Numerals  thanks to you and your website!  In fact, they said I was the only person to get  every single one right!  So thank you!"  — Janet, pharmacy student, Anchorage, Alaska, USA.           September 2001