NUMBER LAB · EXPLORE WITH CONFIDENCE

Negative Base Number Converter

Convert decimal integers to negabinary, negadecimal and other negative bases, or decode their digits with exact positional steps.

Worked examplesBrowser processingTXT · CSV · JSON

Explore the example, or adjust the inputs. Save a project to keep your settings.

A useful starting point

In base -2, -13 is 110111. The alternating positive and negative place values encode the sign without a minus symbol.

Scope and limits

Bases -2 through -36; decimal input up to 300 digits or encoded input up to 1,000 unsigned digits. No fractions or prefixes.

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Using Negative Base Number Converter

Convert decimal integers to negabinary, negadecimal and other negative bases, or decode their digits with exact positional steps.

Choose a worked example or enter your own values in the labeled controls.
Adjust the available options. Results refresh when you leave a field or choose an option.
Review the result summary, interpretation and calculation table. Check any explicit limits or assumptions.
Copy the text or download TXT, CSV or JSON. Save a project to reopen the same inputs later.

Example

In base -2, -13 is 110111. The alternating positive and negative place values encode the sign without a minus symbol.

Questions & answers

Is this two’s complement?

No. A negative positional base alternates the sign of powers. Two’s complement is a separate fixed-width binary representation.

Can encoded input start with a minus sign?

No. Negative-base digits already represent both signs without a sign prefix. Use signed input only in the decimal-to-negative-base direction.

Can I save and reopen my settings?

Yes. Save project downloads a JSON file for this tool. Open project restores it; undo and redo work during the current session.

Does the table contain every result?

The table is paginated in groups of 50. Downloads contain all listed rows. The partition tool intentionally caps its example listing while reporting the full exact count.