Wolfram|Alpha Mathematics

Historical Numerals

Roman Numerals

convert Roman numerals to standard number notation
MDCCLXXVI
convert a decimal number to Roman numerals
343 to Roman numerals
do computations with Roman numerals
XLVIII + LXXII
do mixed-notation computations
MMVIII - 25

Greek Numerals

convert a decimal number to Greek numerals
1275 to Greek numerals

Mayan Numerals

convert a decimal number to Mayan numerals
365 to Mayan

Babylonian Numerals

convert a decimal number to Babylonian numerals
1000 to Babylonian
convert from one historical numeral system to another
CLXX to Babylonian