🏛️ Roman Numeral Converter
Type a number like 2026 or a Roman numeral like MMXXVI — the converter detects which one you entered.
Converted
How the Roman Numeral Converter works
Roman numerals add symbol values (I 1, V 5, X 10, L 50, C 100, D 500, M 1000), except that a smaller symbol before a larger one is subtracted (IV = 4, IX = 9, XL = 40, XC = 90, CD = 400, CM = 900).
I=1 · V=5 · X=10 · L=50 · C=100 · D=500 · M=1000
Subtract when smaller comes first: IV=4, IX=9, XL=40, XC=90, CD=400, CM=900
Step-by-step calculation
- 1Enter a number or Roman numeral.
- 2Add symbol values, subtracting smaller-before-larger pairs.
Worked example
2026 = MMXXVI (1000 + 1000 + 10 + 10 + 5 + 1). 1994 = MCMXCIV.
Roman Numeral Converter examples
| Number or Roman numeral | Converted |
|---|---|
| 4 | IV |
| 9 | IX |
| 14 | XIV |
| 40 | XL |
| 90 | XC |
| 2026 | MMXXVI |
Other inputs kept at the calculator's default values. Results calculated by this calculator.
Why use a Roman Numeral Converter?
Read dates, clocks, outlines and movie credits.
Important factors that can affect your results
- Standard numerals go up to 3,999.
- No zero.
- Non-standard forms like IIII.
Frequently asked questions
Why only up to 3,999?
Standard Roman numerals have no symbol above M (1,000); larger numbers used special bars that are rarely used today.
Is there a Roman numeral for zero?
No.
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Last reviewed November 2026 · How we build and check our tools · Report a problem