Number & Unit Converters
Convert between number bases, byte sizes (KB vs KiB) and CSS px / rem / em. Everything happens entirely in your browser — nothing is sent to a server.
Two's complement (for negative values)
Decimal (SI, powers of 1000)
Binary (IEC, powers of 1024)
Absolute units use the CSS reference pixel (1in = 96px). Percent is relative to the "parent / reference" size above.