Octal to Decimal
Decode octal numbers into decimal integers — perfect for translating Unix permission codes.
AK
appkiro.comOctal digits 0–7.
Decimal integer.
Convert octal numbers to decimal. The classic use is decoding Unix file permission masks like 755 or 644 into the decimal byte value stored on disk.
Why does 755 become 493?
7×64 + 5×8 + 5 = 493 — that is the decimal interpretation of base-8 digits.
Are leading zeros stripped?
Leading zeros are accepted and treated as octal digits, not as decimal padding.