Data Storage Converter

This gigabytes to megabytes converter changes any storage size into any other: bits, bytes, kilobytes, megabytes, gigabytes, and terabytes. Type a number, pick the units, and the answer appears right away. Everything runs in your browser, so nothing you type leaves your device.

Binary basis: 1 GB = 1024 MB, 1 TB = 1024 GB.

How data storage conversion works

This tool uses the binary basis. Each step up multiplies by 1,024:

  • 8 bits = 1 byte
  • 1,024 bytes = 1 kilobyte (KB)
  • 1,024 KB = 1 megabyte (MB)
  • 1,024 MB = 1 gigabyte (GB)
  • 1,024 GB = 1 terabyte (TB)

So 1 GB = 1,024 MB and 1 TB = 1,024 GB. Results are rounded to 4 decimal places.

Common storage sizes: a quick reference

See how everyday files and drives compare.

What it is About this size
A short text message about 1 kilobyte
A 3-minute song (MP3) about 3 megabytes
A full HD movie about 4 gigabytes
A laptop hard drive 500 gigabytes
A large backup drive 2 terabytes

Solved example: 2.5 GB to MB

You have a 2.5 GB video file. How many megabytes is that? Here is the math, step by step.

  1. The tool uses the binary basis: 1 GB = 1,024 MB.
  2. Multiply: 2.5 × 1,024 = 2,560.

Answer: 2.5 GB = 2,560 MB.

How to use this converter

  1. Type the size into the box.
  2. Pick the unit you are converting from and the unit you want.
  3. Press Convert and read the result with the factor the tool used.

Limits: what this converter does not do

  • It uses the binary basis (1 GB = 1,024 MB). Some drive makers use the decimal basis (1 GB = 1,000 MB), so a store label and this tool can disagree.
  • Sizes are rounded to 4 decimal places.
  • It converts storage amounts only. It does not measure download speed or transfer time.

Frequently asked questions

Why does this gigabytes to megabytes converter use 1,024 instead of 1,000?

Because computers work in binary. Each unit is 1,024 times the one below it: 1 GB = 1,024 MB. Some drive makers use 1,000 instead, which is why a 1 TB drive shows less than 1 TB on your computer.

How many megabytes are in 1 terabyte?

1,048,576. A terabyte is 1,024 gigabytes, and a gigabyte is 1,024 megabytes, so 1,024 × 1,024 = 1,048,576 MB.

What is the difference between a bit and a byte?

A bit is the smallest piece of data: a single 0 or 1. A byte holds 8 bits. File sizes are usually shown in bytes (KB, MB, GB), while internet speeds are usually shown in bits per second.

Why does my 1 TB drive show less than 1 TB?

Your computer counts in binary (1 TB = 1,024 GB), but the box may be labelled in decimal (1 TB = 1,000 GB). The drive has not lost space; the two sides just count differently.

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