Roman numeral converter
Convert Roman Numerals to Numbers
Enter a Roman numeral to find the number it represents and check whether it is written in standard form.
Enter a standard Roman numeral from I to MMMCMXCIX.
Worked example
MMXXVI = 2026
MM is 2000, XX is 20 and VI is 6. Add the three groups together and the numeral equals 2026.
- MM
- 2000
- XX
- 20
- VI
- 6
The basic idea
How to read a Roman numeral
Read the symbols from left to right. When a smaller value appears before a larger one, subtract it. Otherwise, add the values together.
MMXXVI is entirely additive: MM is 2000, XX is 20 and VI is 6. A numeral such as MCM uses CM to represent 900.
Learn how Roman numerals workRoman converter help
Common questions
Useful answers about lowercase input, standard forms and historical variations.
Can I type Roman numerals in lowercase?
Yes. You can enter lowercase letters, and the converter will show the result in uppercase.
What happens if the numeral is not in standard form?
We’ll show the number it represents and suggest the standard modern form. Non-standard spellings do not receive their own permanent result page.
Why does IIII appear on some clocks?
IIII is a historical clock-face convention. For ordinary modern Roman numeral writing, 4 is normally written as IV.
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