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Data Storage Converter

Convert between bits, bytes and decimal (KB, MB, GB) or binary (KiB, MiB, GiB) storage units.

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Runs in your browser. Nothing you enter is uploaded.

01How to use the Data Storage Converter

  1. 01Type the size.
  2. 02Choose its unit.
  3. 03Read the size in both decimal and binary units.

02Conversion factors

1 byte = 8 bits

Decimal (SI):   1 KB = 1,000 B      1 MB = 1,000 KB
                1 GB = 1,000 MB     and so on
Binary (IEC):   1 KiB = 1,024 B     1 MiB = 1,024 KiB
                1 GiB = 1,024 MiB   and so on

03Examples

A 1 TB drive holds 931.32 GiB, which is why a computer may show it as “931 GB”.

1 GB = 8,000,000,000 bits.

A 4.7 GB DVD holds 4.377 GiB.

04Frequently asked questions

Why does my new drive show less space than advertised?

Drive makers use decimal units (1 GB = 10⁹ bytes). Windows reports binary units (2³⁰ bytes) but labels them GB, so the number looks about 7% smaller.

Is a kilobyte 1,000 or 1,024 bytes?

Under the SI and IEC standards, 1 KB = 1,000 bytes and 1 KiB = 1,024 bytes. Some software still uses KB to mean 1,024.

Why are internet speeds in bits?

Network speeds are quoted in bits per second. Divide Mbps by 8 to get megabytes per second.