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Binary, Hex, Decimal & Octal Converter
Free number base converter: convert between decimal, hexadecimal, binary and octal instantly, with grouped digits, bit length and ASCII character, using BigInt so large numbers stay exact.
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Questions people ask
How do I convert hex to decimal?+
Each hex digit is a power of 16: 0xFF = 15 × 16 + 15 = 255. Type it with Hex selected to see every base.
Can it convert very large numbers?+
Yes. It uses BigInt, so 64-bit and larger values convert exactly.
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