Octal to Decimal Converter
Convert octal numbers to decimal (base 10) instantly.
Unix File Permissions Reference
755
rwxr-xr-x (typical executable)
644
rw-r--r-- (typical file)
777
rwxrwxrwx (full access)
600
rw------- (private file)
Code Examples
const octal = "755";
const decimal = parseInt(octal, 8); // 493
// With 0o prefix:
const permissions = 0o755; // 493Frequently Asked Questions
What is octal used for?
Octal is primarily used for Unix/Linux file permissions (chmod 755). Each octal digit represents 3 bits, making it convenient for read/write/execute permission groups.
How do I read file permissions in octal?
Each digit represents permissions: 4=read, 2=write, 1=execute. Sum them for each group (owner/group/others). 755 means owner has all (7), group and others can read+execute (5).