Roman Numerals Converter

The Roman numeral system is an additive and subtractive notation based on seven primary symbols: I (1), V (5), X (10), L (50), C (100), D (500), and M (1000). To convert an Arabic number, the calculator breaks the input down by place value (thousands, hundreds, tens, and units). Values are generally constructed from left to right in descending order of magnitude. When a smaller value precedes a larger value—such as IV (4) or IX (9)—it represents subtraction. Otherwise, values are added together sequentially.

Let us convert the Arabic number 1984 into Roman numerals. First, break the number down by its place values: 1000 (M), 900 (CM), 80 (LXXX), and 4 (IV). Next, assemble these components in descending order from left to right. Combining M + CM + LXXX + IV gives us MCMLXXXIV. This modular approach ensures every digit is correctly translated according to standard subtractive notation rules.

Always remember the subtraction rule constraint: you can only subtract powers of ten (I, X, C) from the next two higher symbols (for example, I can be subtracted from V and X, but not from L or C). Additionally, never repeat a symbol more than three times consecutively; use subtractive notation instead of writing IIII for four.