Hex to Octal Converter
Convert hex numbers to octal instantly, at any size. Everything runs in the browser.
About hex and octal
Hexadecimal is base 16 — digits 0–9 then a–f. One hex digit is exactly four bits, so bytes read as tidy two-digit pairs. Colors, memory addresses and hashes are all conventionally written in hex with a 0x prefix.
Octal is base 8, using digits 0–7. Each octal digit maps to exactly three bits, which is why Unix file permissions like 755 are octal. Code writes it with a 0o prefix.
For example, hex 7c3aed is 37035355 in octal. The converter uses BigInt, so numbers of any size convert without losing precision, entirely in the browser.
More number base converter pages
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