Octal to Binary Converter
Enter an octal number to see its binary equivalent. Each octal digit expands to exactly 3 binary bits for detailed bit-level representation.
Octal to Binary
Base 8 → Base 2
0o
0b
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How to Use the Octal to Binary Converter
1
Enter an octal number.
2
Click Convert.
3
View the binary representation.
Frequently Asked Questions
How does octal-to-binary conversion work?
Replace each octal digit with its 3-bit binary equivalent: 7 = 111, 5 = 101, 0 = 000.
Is this the reverse of binary-to-octal?
Yes — they are exact inverses. Converting back and forth always produces the original number.
Why 3 bits per octal digit?
Because octal is base 8 = 2³, so each octal digit maps to exactly 3 binary digits.