What is the largest number this supports?

It converts whole numbers from 1 to 3999 (I to MMMCMXCIX), the standard range using the basic letters I, V, X, L, C, D and M without overline notation.

How do Roman numerals like IV and IX work?

When a smaller symbol comes before a larger one it is subtracted — IV is 5 − 1 = 4 and IX is 10 − 1 = 9. Otherwise symbols are added left to right.

Is anything uploaded?

No — the conversion happens entirely in your browser with no network calls.

Why is there no zero in Roman numerals?

The Roman system has no symbol for zero — it is purely additive and subtractive from I upward. The concept of zero as a numeral came later from Indian and Arabic mathematics, which is also why the minimum value here is 1.

What are the six subtractive pairs?

Only six combinations subtract: IV (4), IX (9), XL (40), XC (90), CD (400), and CM (900). A symbol is never repeated more than three times in a row, which is why 4 is IV rather than IIII.

How do I write the current year in Roman numerals?

2026 is MMXXVI — MM (2000) + XX (20) + V (5) + I (1). The chart includes common years so you can look them up directly.

Is anything uploaded?

No — the conversion happens entirely in your browser with no network calls.

Roman Numerals Chart

Type any whole number from 1 to 3999 and get its Roman numeral instantly, or use the reference chart of symbol values and common conversions. It is handy for clock faces, book chapters, movie sequels, copyright years, and homework.

How it works

Roman numerals use seven letters with fixed values: I=1, V=5, X=10, L=50, C=100, D=500, M=1000. The converter works greedily from the largest value down, subtracting each value from the number as many times as it fits and appending its symbol — including the six subtractive pairs (IV, IX, XL, XC, CD, CM) so that 4 is written IV, not IIII. The standard range without overline notation is 1 to 3999 (I to MMMCMXCIX), which is the limit this tool supports.

Example

Convert 1994:

1000 → M (remainder 994)
900 → CM (remainder 94)
90 → XC (remainder 4)
4 → IV
Result: MCMXCIV

Number	Roman
4	IV
9	IX
40	XL
90	XC
400	CD
2026	MMXXVI

Everything runs in your browser with no network calls.