Binary to Octal
Turn Binary numbers into Octal in your browser. Every digit is converted exactly, even for very long values, and nothing is sent to a server.
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Binary
1010Octal
12Decimal
10Hexadecimal
ASpaces and underscores are ignored; 0b, 0o and 0x prefixes are supported.
Common conversions
| Binary | Octal |
|---|---|
| 1 | 1 |
| 10 | 2 |
| 100 | 4 |
| 1000 | 10 |
| 1010 | 12 |
| 10000 | 20 |
| 11111111 | 377 |
Leading zeros are dropped; longer values follow the same digit weights.
Frequently asked questions
How do I convert Binary to Octal?
Each Binary digit is multiplied by its place value, then the total is written using Octal digits. The table above shows the pattern for small values.
Can I convert fractions?
No. This converter works with unsigned integers only. Convert the integer part first and handle the fraction separately.
How large can the numbers be?
Up to 200 characters, which covers values far beyond 64-bit range. Precision stays exact because the conversion uses big integers.
Related conversions
Octal to Binary Binary to Decimal Binary to Hexadecimal Decimal to Binary Decimal to Hexadecimal Hexadecimal to Decimal
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