What number bases does the converter support?

The converter supports the four most common bases used in computing: binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16). Enter a value in any base and the tool instantly shows the equivalent in all other bases.

Why are hexadecimal numbers used in computing?

Hexadecimal is used because it maps neatly to binary — each hex digit represents exactly four binary bits. This makes it much more compact and readable than raw binary for memory addresses, color codes, byte values, and machine code.

Can I convert negative numbers?

The converter handles positive integers. For negative numbers in binary, you would need to work with two's complement representation, which is the convention used by most processors. Enter the magnitude and apply two's complement rules manually if needed.

Dev Tool

Number Base Converter

Convert numbers between binary, octal, decimal and hexadecimal instantly. Edit any field to update all others.

Binary (Base 2)

Octal (Base 8)

0-7

Decimal (Base 10)

0-9

Hexadecimal (Base 16)

0-9, A-F

BIT VISUALISATION

CUSTOM BASE CONVERTER

Number

From base

To base

Result

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Edit any field

Change any value and all other bases update instantly. No convert button needed.

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Bit visualiser

See the binary representation of any number as individual bits with position labels.

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Custom bases

Convert between any base from 2 to 36 — including base 32, base 58 and others.

Frequently Asked Questions

What are number bases used for in programming?

Binary (base 2) is the fundamental language of computers — all data is stored as 0s and 1s. Hexadecimal (base 16) is used to represent binary data compactly — memory addresses, color codes (#FF5733), byte values. Octal (base 8) is used in Unix file permissions (chmod 755).

How do I convert binary to decimal manually?

Multiply each bit by 2 raised to its position (counting from 0 on the right). 1011 in binary = 1×8 + 0×4 + 1×2 + 1×1 = 8+0+2+1 = 11 in decimal.

What is the maximum number I can convert?

JavaScript handles integers safely up to 2^53 - 1 (9,007,199,254,740,991). For larger numbers the converter uses BigInt internally where supported.

Number Base Converter

Frequently Asked Questions

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