Skip to content

Gigabytes to Megabytes Converter

Convert gigabytes to megabytes and megabytes to gigabytes instantly. Bidirectional digital storage converter with formula and common values.

Gigabytes to Megabytes: 1 GB equals 1000 MB. To convert gigabytes to megabytes, multiply by 1000 (MB = GB × 1000). For example, 10 GB = 10000 MB.

4.7 GB = 4,700 MB

MB = GB × 1000

How to Convert Gigabytes to Megabytes

To convert from gigabytes to megabytes, multiply the value by 1000. The conversion is linear, meaning doubling the input doubles the output.

Conversion Formula

  • Gigabytes to Megabytes: MB = GB × 1000
  • Megabytes to Gigabytes: GB = MB ÷ 1000
Gigabytes to Megabytes conversion scale — a dual ruler showing 1 GB equals 1,000 MB.
Gigabytes to Megabytes conversion scale (GB to MB).

Gigabytes to Megabytes Conversion Chart

Gigabytes (GB)Megabytes (MB)
0.1100
0.25250
0.5500
11000
22000
33000
55000
1010000
2020000
2525000
5050000
100100000
250250000
10001000000

Understanding the Units

What is a Gigabyte?

A gigabyte equals one billion bytes (10⁹) in modern SI usage. Storage marketers use the SI definition; some operating systems (e.g., Windows) display the binary GiB (1,073,741,824 bytes) but label it "GB".

Common contexts: storage drives, mobile data plans.

What is a Megabyte?

A megabyte equals one million bytes (10⁶) in modern SI usage; storage marketing has used this convention since around 2000.

Common contexts: file sizes, photos, documents.

Real-World Reference Points

Item Gigabytes (GB) Megabytes (MB)
Standard-definition movie11000
HD movie (Blu-ray)2525000
Modern smartphone storage256256000

Related

Megabytes to Gigabytes Converter

1 GB = 1,000 MB (decimal SI). Convert megabytes to gigabytes and back with data-plan and storage examples.

Bytes to Megabytes

Convert bytes to megabytes and back.

Gigabytes to Bits

Convert gigabytes to bits and back.

Gigabytes to Terabytes Converter

Convert gigabytes to terabytes and terabytes to gigabytes.

MB to KB Converter

1 MB = 1,000 KB (decimal SI). Convert megabytes to kilobytes and back with real file-size examples.

Kilobytes to Megabytes Converter

Convert kilobytes to megabytes and megabytes to kilobytes.

FAQ

How many megabytes are in a gigabyte?

One gigabyte equals 1,000 megabytes (decimal, the SI standard used by storage manufacturers and this converter). Operating systems sometimes report binary units, where 1 GiB = 1,024 MiB.

How do I convert GB to MB?

Multiply the number of gigabytes by 1,000. For example, 3.7 GB × 1,000 = 3,700 MB.

Why do manufacturers and operating systems show different sizes?

Storage manufacturers use decimal (1 GB = 1,000 MB) while operating systems use binary (1 GiB = 1,024 MiB). This converter uses the decimal standard.

How many GB are in a TB?

One terabyte equals 1,000 gigabytes (decimal). In binary units, 1 TiB = 1,024 GiB.

How many megabytes are in 1 gigabyt?

1 GB equals 1000 MB.

How do you convert gigabytes to megabytes?

Multiply the gigabyt value by 1000. Formula: MB = GB × 1000.

How many megabytes are in 5 gigabytes?

5 GB = 5000 MB.

How do you convert megabytes back to gigabytes?

Use the inverse formula: GB = MB ÷ 1000. For example, 1 MB = 0.001 GB.

What is the difference between Gigabyt and Megabyt?

A gigabyte equals one billion bytes (10⁹) in modern SI usage. Storage marketers use the SI definition; some operating systems (e.g., Windows) display the binary GiB (1,073,741,824 bytes) but label it "GB". A megabyte equals one million bytes (10⁶) in modern SI usage; storage marketing has used this convention since around 2000.