A Roman numeral converter changes regular numbers into Roman numerals and Roman numerals back into regular numbers. Enter a value to convert it, validate the notation, and learn how I, V, X, L, C, D, and M fit together.
Quick Examples
Converter
Standard Roman numerals support whole numbers from 1 through 3999. Use overline notation for larger historical values.
Result
MMXXVI
2,026 is MMXXVI in Roman numerals.
M M X X V I
Step 1
Start with 2,026 and subtract the largest Roman values first.
Step 2
Use subtractive pairs such as CM for 900, XC for 90, and IV for 4 when needed.
Step 3
Write the remaining symbols in order to get MMXXVI.
Put a smaller symbol before a larger symbol only for these six standard pairs.
IV = 4
one before five
IX = 9
one before ten
XL = 40
ten before fifty
XC = 90
ten before one hundred
CD = 400
one hundred before five hundred
CM = 900
one hundred before one thousand
A Roman numeral converter changes regular numbers into Roman numerals and Roman numerals back into regular numbers using the symbols I, V, X, L, C, D, and M.
This converter supports standard Roman numerals from 1 through 3999. The standard form for 3999 is MMMCMXCIX.
2026 is MMXXVI in Roman numerals. That means 2000 plus 20 plus 6.
Roman numerals use subtraction when a smaller symbol comes before a larger symbol. For example, IV is 4, IX is 9, XL is 40, and CM is 900.
The converter rejects forms that are not standard Roman notation, such as IIII, VV, IC, or repeated subtractive pairs.