Number to Words
Write numbers and money amounts in words, in English or Arabic - AED, SAR, USD and more, cheque and invoice style.
Calculators
Convert numbers to Roman numerals and back, one per line, with strict checks that explain why a numeral is wrong.
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Type numbers or Roman numerals, one per line, and each line is converted the right way automatically. Roman input is checked against the standard form, so IIII, VV or IC are refused with the reason and the standard spelling of what they add up to (IV, X, XCIX).
The standard system covers 1 to 3,999; larger numbers need an overline notation that plain text cannot show, and there is no Roman numeral for zero. Turn on "show how it is built" to see each numeral broken into its parts.
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