Why does my hard drive show less space than advertised?

Drive makers count a gigabyte as 1,000,000,000 bytes (decimal), but operating systems often count it as 1,073,741,824 bytes (binary, properly a gibibyte). The drive is the size advertised; your computer is just measuring it in binary units, which makes the number look smaller. This converter shows both so the gap makes sense.

What is the difference between a megabyte and a mebibyte?

A megabyte (MB) is 1,000,000 bytes in the decimal system. A mebibyte (MiB) is 1,048,576 bytes, the binary equivalent. They are close but not equal, and the gap grows at larger sizes, which is the source of a lot of storage confusion. Network speeds use decimal; memory often uses binary.

Does this work offline and is anything sent to a server?

The conversion runs entirely in your browser, so nothing you type is sent anywhere, and once the page has loaded it keeps working with no connection. There is no sign-up and no limit on how many conversions you make.

Data Storage Converter

Convert digital storage between bits, bytes, kilobytes, megabytes, gigabytes and terabytes, including the binary KiB, MiB, GiB and TiB. Type a value and see it in every unit. A free, exact data storage converter in your browser.

Exact, standard factors
100% free
No sign-up, no app
Instant as you type
Works offline after first load

Read the guide: How to Convert MB to GB

Convert

From

0.001GB

1 MB = 0.001 GB

1 MB in every unit

Bit8,000,000 b

Byte1,000,000 B

Kilobyte1,000 KB

Megabyte1 MB

Gigabyte0.001 GB

Terabyte0.000001 TB

Petabyte1.000000e-9 PB

Kibibyte976.5625 KiB

Mebibyte0.95367432 MiB

Gibibyte0.00093132 GiB

Tebibyte9.094947e-7 TiB

How to use it

1
Enter a value

Type the number you want to convert. The result updates as you type, with no button to press.
2
Pick the units

Choose what you are converting from and to. Swap them with one click if you need the reverse.
3
Read or copy

See the exact result, plus a table of your value in every unit. Copy any line you need.

When it comes in handy

Files and drives

Work out how many megabytes are in a gigabyte, or how many files of a size fit on a drive.

Internet and downloads

Convert between bits and bytes to compare a connection speed in megabits with a file size in megabytes.

Coding and storage

Switch between decimal and binary units when a tool reports one and you expect the other.

Instant, exact & 100% in your browser

The conversion runs right here in your browser using exact, standard factors. Nothing you type is sent to a server, there is no sign-up and no limit, and once the page has loaded it keeps working even with no connection.

Frequently asked questions

Why does my hard drive show less space than advertised?: Drive makers count a gigabyte as 1,000,000,000 bytes (decimal), but operating systems often count it as 1,073,741,824 bytes (binary, properly a gibibyte). The drive is the size advertised; your computer is just measuring it in binary units, which makes the number look smaller. This converter shows both so the gap makes sense.
What is the difference between a megabyte and a mebibyte?: A megabyte (MB) is 1,000,000 bytes in the decimal system. A mebibyte (MiB) is 1,048,576 bytes, the binary equivalent. They are close but not equal, and the gap grows at larger sizes, which is the source of a lot of storage confusion. Network speeds use decimal; memory often uses binary.
Does this work offline and is anything sent to a server?: The conversion runs entirely in your browser, so nothing you type is sent anywhere, and once the page has loaded it keeps working with no connection. There is no sign-up and no limit on how many conversions you make.