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Data storage converters

Bits and bytes up to terabytes, plus the binary units (KiB, MiB, GiB) your OS may show.

1 bit = 0.125 B

All data storage conversions

The units

bit (bit)
A single binary digit. Network speeds are quoted in bits per second, so Mbps is megabits.
byte (B)
8 bits. The basic unit for file and memory sizes.
kilobyte (kB)
1,000 bytes in the SI (decimal) system that drive makers and macOS use.
megabyte (MB)
1,000,000 bytes (decimal). Windows shows MiB values but labels them MB.
gigabyte (GB)
1,000,000,000 bytes (decimal). Phone storage and data plans are sold in GB.
terabyte (TB)
10¹² bytes (decimal). Hard drives are sold in TB, which is why a 1 TB drive shows about 931 GiB.
mebibyte (MiB)
2²⁰ = 1,048,576 bytes. The binary unit behind most memory and OS file sizes.
gibibyte (GiB)
2³⁰ bytes, about 7.4% more than a GB. RAM is sized in GiB.

Other converters: Length, Weight, Area, Volume, Temperature, Speed, Indian number units.