Ensure
Number & Math

Number Base Converter

Convert numbers between binary, octal, decimal and hexadecimal.

Binary (base 2)

0b11111111

Octal (base 8)

0o377

Decimal (base 10)

255

Hexadecimal (base 16)

0xFF

Base 36 (base 36)

73

Bit length

8

Bytes needed

1

As bytes

255 B

Guides that cover this

Number bases, byte sizes and the units people argue aboutHow hex maps onto bits, why a 1 TB drive shows as 931 GB, what 0.1 plus 0.2 actually equals, and how rounding, percentages and locale formatting quietly change a number.

Related tools

Sum and Average
Add up a list of numbers and see the mean, median and spread.
Number & Math
Number to Words
Write a number out in words, as a cardinal or an ordinal.
Number & Math
Number Sequence
Generate arithmetic, geometric, Fibonacci, prime and square sequences.
Number & Math
Unit Converter
Convert length, mass, temperature and digital storage units.
Number & Math