Roman
Numeral.
Type a date and get its Roman-numeral form, plus reverse-conversion. The classic DD · MM · YYYY tattoo format is highlighted up top.
Date → Roman
Date
Separator
Style
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Pick a date to see its Roman form
Roman → Date
Roman date
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Type Roman numerals separated by spaces, dots, dashes, or slashes
Single Number1 to 3,999
Number
Roman
The seven Roman symbols
I = 1 V = 5 X = 10
L = 50 C = 100 D = 500 M = 1000
Subtractive rule. A smaller symbol before a larger one means subtract: IV = 4, IX = 9, XL = 40, XC = 90, CD = 400, CM = 900. You can only subtract I from V or X; X from L or C; C from D or M.
Maximum. Standard Roman numerals top out at 3,999 (MMMCMXCIX). Anything beyond needed a bar over the letter (vinculum) to multiply by 1,000.