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Everyday Calculators

Data storage converter

MB, GB, TB — and the binary units behind them.

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MB

Result

0.001 GB

1 MB is 0.001 GB.

KB/MB/GB are decimal (1,000-based); KiB/MiB/GiB are binary (1,024-based), which is what most operating systems show.

The same amount in every unit

Bits
8,000,000 bit
Bytes
1,000,000 B
Kilobytes
1,000 KB
Gigabytes
0.001 GB
Terabytes
0.000001 TB
Kibibytes
976.5625 KiB
Mebibytes
0.953674 MiB
Gibibytes
0.000931 GiB
Tebibytes
0.000001 TiB

How it works

Explains the gap between the size printed on a drive and the size your computer reports, by showing decimal and binary units side by side.

Decimal: 1 KB = 1,000 B Binary: 1 KiB = 1,024 B

Example: A '1 TB' drive holds 1,000,000,000,000 bytes, which the operating system shows as 931 GiB.

Questions people ask

Why does my 1 TB drive show as 931 GB?

Manufacturers count in decimal (1 TB = 10¹² bytes) while operating systems count in binary (1 TiB = 2⁴⁰ bytes) but label it 'GB'. Nothing is missing — the units differ.

How many megabytes are in a gigabyte?

1,000 in decimal, or 1,024 if you mean mebibytes in a gibibyte. Both figures appear in the table on this page.

How big is a bit compared to a byte?

A byte is 8 bits. Broadband speeds are quoted in megabits per second, so a 100 Mbps line downloads at about 12.5 MB per second.

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