Binary to Octal Converter Calculator

Blazing-fast binary to octal converter for learners and pros. Handle fractions, rounding, and signed integers with clear 3-bit mapping. Choose word sizes, format output, and preview decimal or hex. Run batch conversions, export CSV, share permalinks, and keep history. Accessible, responsive, and built with clean Bootstrap components. Works offline, keyboard-friendly, and developer-ready for integration.

Signed modes apply to integers (no binary point).
If not Auto, padding/truncation applies to the integer part.
0 = off
Note: Signed modes affect integer values. Fractional inputs are treated as unsigned with a leading minus sign if present.

Batch conversion

Enter one binary value per line. Batch inherits the options above.

#InputModeBitsOctalDecimalNotes

Result

Octal
Decimal
Hex
Bits: 0
Octal digits: 0

Step-by-step 3‑bit grouping

History

    3‑bit guide

    000 → 0
    001 → 1
    010 → 2
    011 → 3
    100 → 4
    101 → 5
    110 → 6
    111 → 7

    Related Calculators

    Binary Converter

    Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.