CalculatorsLesson 166Free preview

Roman Numeral Converter

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Summary

The Roman Numeral Converter converts ordinary numbers into Roman numbers and vice versa. The system uses the symbols I, V, X, L, C, D, and M with rules of deduction for values such as IV, IX, XL, XC, CD, and CM. Standard converters generally restricted the numbers 1 to 3999 because ancient Roman numbers did not have a zero symbol.

Key points

The symbol value: I = 1, V = 5, X = 10, L = 50, C = 100, D = 500, M = 1000
The smaller symbol to the left of the larger symbol means a reduction
IV is 4, IX is 9, XL is 40, XC is 90, CD is 400, and CM is 900.
There are no zeroes in the standard Roman system
The common limit of the converter is 1 to 3999.

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