Roman numerals, dates, conversions and calculator

Roman numerals are a numbering system that was developed and used throughout the Roman Empire. This special system uses some capital letters of the Roman alphabet (I, V, X, L, C, and M) as symbols to represent certain values.

Converting Arabic Numbers and Dates to Roman Numerals

You can convert the natural number, for example 123 or the date in DD/MM/YYYY format, for example 17/09/2024

Converting Roman Numerals and Dates to Decimal Numbers (Arabic)

You can convert the number in Roman format, for example CXXIII or date in Roman format, for example "XVII / IX / MMXXIV".

Roman numeral calculator

You can calculate add (+), subtract (-), multiply (*) and divide (/) the number in Roman format, for example CXXIII - VI or CXXIII + VI.

Converting Between Roman Numerals and Decimal Numbers (Arabic). Actual year 2024 in Roman numerals. Date conversion and Roman numeral calculator.

Roman numeration

Figures (numbers, numerals) main Roman symbols and their values : I = 1 (one); V = 5 (five); X = 10 (ten); L = 50 (fifty); C = 100 (hundred); D = 500 (five hundred); M = 1,000 (one thousand); (V) = 5,000 (five thousand); (X) = 10,000 (ten thousand); (L) = 50,000 (fifty thousand); (C) = 100,000 (hundred thousand); (D) = 500,000 (five hundred thousand)

The basic rules of forming Roman numerals are :
1. When a symbol appears after a larger one, it is added (for example: VI = V + I = 5 + 1 = 6)
2. When a symbol appears before a larger one, it is subtracted (for example: IX = X - I = 10 - 1 = 9)
3. The same symbol is not used more than three times in a row.
4. Numbers are read from left to right starting with the highest value symbols, or highest value set of symbols.
5. Other rules

List of the first 10,000 Roman numeralsfrom 0 to 100

Roman numerals, nomination (writing) and decimal equivalences.
Roman  NominationDecimal
zero0
Ione1
IItwo2
IIIthree3
IVfour4
Vfive5
VIsix6
VIIseven7
VIIIeight8
IXnine9
Xten10
XIeleven11
XIItwelve12
XIIIthirteen13
XIVfourteen14
XVfifteen15
XVIsixteen16
XVIIseventeen17
XVIIIeighteen18
XIXnineteen19
XXtwenty20
XXItwenty-one21
XXIItwenty-two22
XXIIItwenty-three23
XXIVtwenty-four24
XXVtwenty-five25
XXVItwenty-six26
XXVIItwenty-seven27
XXVIIItwenty-eight28
XXIXtwenty-nine29
XXXthirty30
XXXIthirty-one31
XXXIIthirty-two32
XXXIIIthirty-three33
XXXIVthirty-four34
XXXVthirty-five35
XXXVIthirty-six36
XXXVIIthirty-seven37
XXXVIIIthirty-eight38
XXXIXthirty-nine39
XLforty40
XLIforty-one41
XLIIforty-two42
XLIIIforty-three43
XLIVforty-four44
XLVforty-five45
XLVIforty-six46
XLVIIforty-seven47
XLVIIIforty-eight48
XLIXforty-nine49
Lfifty50
LIfifty-one51
LIIfifty-two52
LIIIfifty-three53
LIVfifty-four54
LVfifty-five55
LVIfifty-six56
LVIIfifty-seven57
LVIIIfifty-eight58
LIXfifty-nine59
LXsixty60
LXIsixty-one61
LXIIsixty-two62
LXIIIsixty-three63
LXIVsixty-four64
LXVsixty-five65
LXVIsixty-six66
LXVIIsixty-seven67
LXVIIIsixty-eight68
LXIXsixty-nine69
LXXseventy70
LXXIseventy-one71
LXXIIseventy-two72
LXXIIIseventy-three73
LXXIVseventy-four74
LXXVseventy-five75
LXXVIseventy-six76
LXXVIIseventy-seven77
LXXVIIIseventy-eight78
LXXIXseventy-nine79
LXXXeighty80
LXXXIeighty-one81
LXXXIIeighty-two82
LXXXIIIeighty-three83
LXXXIVeighty-four84
LXXXVeighty-five85
LXXXVIeighty-six86
LXXXVIIeighty-seven87
LXXXVIIIeighty-eight88
LXXXIXeighty-nine89
XCninety90
XCIninety-one91
XCIIninety-two92
XCIIIninety-three93
XCIVninety-four94
XCVninety-five95
XCVIninety-six96
XCVIIninety-seven97
XCVIIIninety-eight98
XCIXninety-nine99