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Data Size Converter

Instantly convert data sizes between bits, bytes, MB, GB, MiB, GiB, and other SI and IEC units.

Use a comma or period as the decimal separator; do not use thousands separators.

All units

Base units

Use as target unit: bit
bit (bit)
8,000,000,000
Use as target unit: byte
byte (B)
1,000,000,000

Decimal (SI) - bytes

Use as target unit: kilobyte
kilobyte (kB)
1,000,000
Use as target unit: megabyte
megabyte (MB)
1,000
Use as target unit: gigabyte
gigabyte (GB)
From
1
Use as target unit: terabyte
terabyte (TB)
0.001
Use as target unit: petabyte
petabyte (PB)
0.000001
Use as target unit: exabyte
exabyte (EB)
1e-9

Binary (IEC) - bytes

Use as target unit: kibibyte
kibibyte (KiB)
976,563
Use as target unit: mebibyte
mebibyte (MiB)
953.674
Use as target unit: gibibyte
gibibyte (GiB)
To
0.931323
Use as target unit: tebibyte
tebibyte (TiB)
0.000909495
Use as target unit: pebibyte
pebibyte (PiB)
8.88178e-7
Use as target unit: exbibyte
exbibyte (EiB)
8.67362e-10

Decimal (SI) - bits

Use as target unit: kilobit
kilobit (kbit)
8,000,000
Use as target unit: megabit
megabit (Mbit)
8,000
Use as target unit: gigabit
gigabit (Gbit)
8
Use as target unit: terabit
terabit (Tbit)
0.008
Use as target unit: petabit
petabit (Pbit)
0.000008
Use as target unit: exabit
exabit (Ebit)
8e-9

Binary (IEC) - bits

Use as target unit: kibibit
kibibit (Kibit)
7,812,500
Use as target unit: mebibit
mebibit (Mibit)
7,629.39
Use as target unit: gibibit
gibibit (Gibit)
7.45058
Use as target unit: tebibit
tebibit (Tibit)
0.00727596
Use as target unit: pebibit
pebibit (Pibit)
0.00000710543
Use as target unit: exbibit
exbibit (Eibit)
6.93889e-9
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Good to know

The data size converter converts directly in your browser between base units, decimal SI units (bit and byte), and binary IEC units (bit and byte). A note explains the key difference: GB uses the decimal system (1 GB = 1,000,000,000 B), while GiB uses the binary system (1 GiB = 1,073,741,824 B).

Typical searches include MB to GB, GiB to GB, and convert storage size. Calculation runs locally in the browser. Operating systems, drive manufacturers, and software sometimes show storage sizes in GB (decimal) and sometimes in GiB (binary) — which explains why a “1 TB” drive often shows as smaller in the operating system.

Typical use cases

Understand drive and cloud storage capacity

Convert between GB and GiB to understand why a purchased drive shows as smaller in the operating system than advertised.

Convert file sizes for uploads and attachments

Convert MB to KB or bytes to compare file or attachment sizes against service or mailbox limits.

Technically compare RAM and memory specs

Use binary IEC units (KiB, MiB, GiB) when RAM or technical specs actually mean powers of two, instead of assuming decimal SI units.

Tips for better results

Deliberately distinguish GB and GiB

1 GB (decimal) equals 1,000,000,000 bytes, 1 GiB (binary) equals 1,073,741,824 bytes — the difference grows with scale and explains apparently “missing” storage.

Don't confuse bit and byte

Network speeds are often given in bits, file sizes in bytes — one byte equals 8 bits, which is easy to overlook in conversions.

How it works

Step by step

  1. 1

    Enter value and source unit

    Enter the data size value and choose the source unit, such as MB or MiB.

  2. 2

    Choose the target unit

    Choose the target unit, even across the decimal and binary systems.

  3. 3

    Copy the result or swap units

    Copy one or all results, or swap the source and target unit for the next conversion.

Features

SI and IEC units separated

Decimal SI units and binary IEC units for bit and byte are cleanly separated.

Local conversion

Calculation happens directly in the browser, without transmission to a server.

Built-in GB-vs-GiB explanation

A note explains directly in the tool the difference between decimal GB and binary GiB.

Frequently asked questions

Why does my operating system show less storage than the box says?

Manufacturers usually state capacity decimally in GB, while operating systems often display it in binary as GiB — the same capacity looks smaller as “GiB”.

Are my inputs uploaded?

No. Conversion runs entirely locally in the browser.

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