Number Base Converter

Convert numbers between decimal, binary, octal, and hexadecimal.

This tool runs entirely in your browser. No data is sent to any server.

Decimal (Base 10)

Binary (Base 2)

0b

Octal (Base 8)

0o

Hexadecimal (Base 16)

0x

Common Values

Dec

Bin

Oct

Hex

0

0

0

0

1

1

1

1

8

1000

10

8

10

1010

12

A

16

10000

20

10

255

11111111

377

FF