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Binary to Octal Converter: Convert Binary Into Base 8
Paste your binary and get the octal value immediately. The converter groups bits into threes from the right, pads anything short, and prints a clean base 8 result.
Group Your Bits Into Threes Automatically
Converting binary to octal means splitting the string into three-bit groups starting from the right, then writing each group as a single digit. Get the grouping wrong by one position and the whole answer changes, so letting the tool do it is worth the click.
Read moreShort Strings Get Padded for You
If your binary does not divide evenly into threes, the converter adds leading zeros on the left. That does not change the value, so 10 is read as 010 and correctly converts to 2.
Read Permission Bits at a Glance
File permission bits come in groups of three by design: read, write and execute. Converting binary to octal collapses each group into one digit, which is exactly how chmod modes like 644 are written.
Use the Binary to Octal Chart
Eight rows cover every possible three-bit group, from 000 as 0 up to 111 as 7. It is the shortest conversion table in computing, and worth learning once rather than looking up repeatedly.
| Binary | Octal |
|---|---|
| 000 | 0 |
| 001 | 1 |
| 010 | 2 |
| 011 | 3 |
| 100 | 4 |
| 101 | 5 |
| 110 | 6 |
| 111 | 7 |
Paste Binary Exactly as You Found It
Spaces, tabs and newlines are stripped before the grouping starts, so binary copied from a terminal, a document or a spreadsheet converts without you cleaning it up first.
Check the Conversion Both Ways
Convert here, then push the octal through our octal to binary tool. Getting your original bits back confirms the grouping and padding were handled correctly.
Processed Locally, Kept Private
Everything runs on your device. The binary you paste is never uploaded, stored or logged anywhere.
How to Convert Binary to Octal
Paste your binary string
Press Convert
Read the octal result
Copy the value
Binary To Octal FAQs
Quick answers on converting binary numbers to octal.
How do you convert binary to octal?
What is 111101101 in octal?
What if my binary is not a multiple of three?
Why group in threes instead of fours?
Can the converter handle spaces in my input?
Can I convert octal back to binary?
Is octal still used today?
Is this binary to octal converter free?
Need hex or decimal?
Try our Binary to Hex Converter, or get the plain number with Binary to Decimal.
Binary to Hex Converter
Raheel Jakhura
CEO / Co-Founder
Our goal is to provide online free tools so you don't have to install any software for basic usages. We are trying to add more tools and make these tools free forever.
