Bin / Oct / Dec / Hex

Number Base Converter

Convert binary, octal, decimal, hexadecimal, and custom bases from 2 to 36 with BigInt precision.

Base conversion

Binary (Base 2)

八进制 (Base 8)

Decimal (Base 10)

Hexadecimal (Base 16)

Custom base (2-36) Custom base结果

Enter a value in any field to update the other bases; prefix negative values with -.

Bitwise overview

Calculates bit length, byte usage, and powers of two from the absolute value.

Quick reference

Notation	Decimal value
2^8	256
2^10	1024
2^16	65536
2^32	4294967296
2^64	18446744073709551616
0xff	255
0xffff	65535
0x7fffffff	2147483647
0o777	511

Click any row to copy its decimal value.

About Number Base Converter

Convert binary, octal, decimal, hexadecimal, and custom bases from 2 to 36 with BigInt precision. Processing happens locally in your browser, and the tool does not upload the entered content.

Privacy and compatibility

Results depend on browser capabilities and the supplied input. Review generated output before using it in production or formal documents.