Roman Numeral Converter

MMMCMXCIX, which is 3999. Classical notation has no way to write 4000 or above without the overline convention, and no symbol for zero at all.

Standard notation uses subtractive pairs - four is IV, not IIII. Clock faces often use IIII for visual balance, which is a design convention rather than correct notation.

Only six: IV, IX, XL, XC, CD and CM. You cannot write IL for 49 - it is XLIX.

Left to right, adding each value, except where a smaller symbol sits before a larger one, in which case subtract it. MCMXCIV is 1000 + (1000−100) + (100−10) + (5−1) = 1994.

Classical notation stops at 3999 (MMMCMXCIX). Above that, medieval scribes drew a bar over a numeral to multiply it by a thousand, a convention called vinculum, which has no standard plain-text form.

2026. M is 1000, so MM is 2000, XX is 20, V is 5 and I is 1.

No. The system has no zero and no negative numbers - it was built for counting and tallying, not arithmetic. Latin writers used the word nulla when they needed nothing.

Tradition and visual balance. IIII mirrors the VIII opposite it, and the practice predates the standardisation of subtractive notation. It is not an error, but it is not standard notation either.