Roman Numerals
Convert decimal numbers to and from Roman numerals.
Convert Roman numerals to standard number notation:
Convert a decimal number to Roman numerals:
Do computations with Roman numerals:
Do mixed-notation computations:
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Greek Numerals
Explore the representation of decimal numbers in ancient Greek numerals.
Convert a decimal number to Greek numerals:
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Mayan Numerals
Explore the representation of decimal numbers in ancient Mayan numerals.
Convert a decimal number to Mayan numerals:
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Babylonian Numerals
Can't count in cuneiform? Convert to and from Babylonian numerals.
Convert a decimal number to Babylonian numerals:
Convert from one historical numeral system to another:
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