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Number base conversion and numeral system utilities. Convert between decimal, binary, hexadecimal, octal and Roman numerals instantly.
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Convert a decimal (base-10) number to binary (base-2)
Use ToolConvert a decimal (base-10) number to hexadecimal (base-16)
Use ToolConvert a decimal (base-10) number to octal (base-8)
Use ToolConvert a binary (base-2) number to decimal (base-10)
Use ToolConvert a hexadecimal (base-16) number to decimal (base-10)
Use ToolConvert an octal (base-8) number to decimal (base-10)
Use ToolConvert a number (1–3999) to its Roman numeral representation
Use ToolConvert Roman numerals back to their decimal number value
Use ToolConvert a binary (base-2) number to hexadecimal (base-16)
Use ToolConvert a hexadecimal (base-16) number to binary (base-2)
Use ToolConvert a number to its English word representation
Use ToolFormat a number with thousands separators (e.g. 1000000 → 1,000,000)
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