Number bases and bit tools

Convert a number to every base at once, turn a size into every unit, or evaluate a bit expression and see which bits are set. Everything uses exact big integers, so large values do not lose digits.

Numbers

Type	Reads
hex ff	ff as hexadecimal
bin 1010, oct 755, dec 255	Binary, octal and decimal
base 255	A number with an optional prefix (0x, 0b, 0o)
base 36 zz	zz in any base from 2 to 36
0xFF, 0b1010, 0o17	A bare prefixed number, with no command word

Underscores are allowed (0b1010_1010), and so is a minus sign. You get decimal (also with thousands separators), hexadecimal, binary (also grouped by four), octal, base 36 and the size in bytes and bits. For a negative number the two’s complement is shown for the widths it fits in: 8, 16, 32 and 64 bits.

A bare 255 is deliberately not a trigger, so ordinary numbers still go to the calculator.

Byte sizes

bytes 1536000 or bytes 1.5 GiB: you get the exact byte count, a human-readable form in both SI (powers of 1000: KB, MB, GB) and IEC (powers of 1024: KiB, MiB, GiB), every unit that is not tiny, and the number of bits. Units are b, kb, mb, gb, tb, pb and kib, mib, gib, tib, pib; a bare k, m, g or t means the binary size. To convert between two units directly, use the unit converter.

Bits

bits <expression> calculates with the C operators: | ^ & << >> ~ + - * / % and parentheses, on numbers in any base. Examples: bits (1<<3)|(1<<5), bits 0xF0 & 0x3C, bits ~0.

bits set 0 2 5 builds a value from bit positions (0 is the lowest bit). The result is shown in every base, with a row listing the bits that are set.

Enter copies a row. The tools are also widgets: Number base converter, Byte size converter and Bit calculator.