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Storage Unit Converter

Instantly convert data storage sizes between Bytes, KB, MB, GB, and TB.

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Converted Result

0 MB

How to Convert Data Storage Units?

Whether you are trying to figure out how many Megabytes are in a Gigabyte, or wondering why your new 1TB hard drive only shows 931GB in Windows, our Storage Unit Converter provides exact mathematical conversions for all digital storage sizes.

  1. Enter your amount: Type the number you want to convert (e.g., 500).
  2. Select your starting unit: Choose the unit you are converting from (e.g., Gigabytes). Note that we offer both Decimal (Base 10) and Binary (Base 2) options.
  3. Select your target unit: Choose the unit you want to convert to (e.g., Megabytes).
  4. Click Convert: Instantly get your accurate storage calculation!

Frequently Asked Questions (FAQ)

Why does my 1TB hard drive only show 931GB in Windows?

This is the most common storage question! Hard drive manufacturers sell storage using the Decimal (Base 10) system, where 1 Terabyte (TB) = 1,000,000,000,000 bytes. However, Microsoft Windows reads storage using the Binary (Base 2) system, where 1 Tebibyte (TiB) = 1,099,511,627,776 bytes. Because Windows incorrectly labels TiB as TB, your 1,000,000,000,000 byte hard drive is displayed as 931 "GB" (actually GiB).

How many Megabytes (MB) are in a Gigabyte (GB)?

If you are using the Decimal standard (used by storage manufacturers and Mac OS), 1 GB equals exactly 1,000 MB. If you are using the Binary standard (used by Windows OS and RAM manufacturers), 1 GiB equals exactly 1,024 MiB.

What is the difference between KB, MB, GB, and TB?

These are prefixes used to denote the size of digital files. A Kilobyte (KB) is 1,000 Bytes, a Megabyte (MB) is 1,000 KB, a Gigabyte (GB) is 1,000 MB, and a Terabyte (TB) is 1,000 GB. A standard photo is usually a few MBs, an HD movie is a few GBs, and a large modern PC hard drive is typically a few TBs.