Base Converter

Convert numbers between binary, octal, decimal and hexadecimal.

🌐 Uses API

Also try:Historical Age Calculator·Pet Age Calculator·Relationship Timeline

Binary

Octal

Decimal

Hexadecimal

Frequently asked questions

What bases are supported?

Binary (2), Octal (8), Decimal (10), and Hexadecimal (16).

Is there a size limit?

This version uses JavaScript numbers; extremely large integers may overflow.

Are inputs sanitized?

Invalid characters are filtered out per-base automatically.

Related tools

Privacy

Most processing happens locally in your browser for speed & privacy. Network calls occur only for live rates or updates.

Premium

Premium feature

Historical analysis & trends

Track your past calculations and visualize patterns.

Calculation presets

Save, load, and manage your favorite calculation setups.

Import

No presets saved yet.

Scenario planning

Compare multiple inputs side-by-side.

Batch processing

Upload a CSV to compute results in bulk.

Custom formulas

Create and reuse your own rules.

External data

Connect Google Sheets or an API as inputs.

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