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Convert gigabytes to megabytes

1 GB=1,000MB

Use the converter below to change any gigabytes value into megabytes instantly — with formula, conversion table, and real-world examples.

1,000

Conversion formula

Forward
megabytes = gigabytes × 1,000
Reverse
gigabytes = megabytes × 0.001

Example: 10 GB × 1,000 = 10,000 MB.

About both units

From

Gigabyte

GB

The gigabyte equals 1,000,000,000 bytes (SI) or 1,073,741,824 bytes (binary, GiB). Standard unit for USB drives, SSDs, mobile-data allowances and RAM. A 64 GB phone holds about 15,000 photos.

Real-world: Smartphone: 64 GB / 128 GB / 256 GB typical. PC RAM: 16 GB / 32 GB common. UHD movie: 20–50 GB.
Read full gigabyte reference →
To

Megabyte

MB

The megabyte equals 1,000,000 bytes (SI) or 1,048,576 bytes (binary, MiB). Used for photos, songs and medium-size documents. A standard MP3 song is 3–5 MB.

Real-world: MP3 song: 3–5 MB. High-res JPEG: 2–8 MB. PDF ebook: 5–50 MB.
Read full megabyte reference →

Gigabyte to Megabyte conversion table

Common gigabytes to megabytes values for quick reference.

Gigabyte (GB)Megabyte (MB)
1 GB1,000 MB
10 GB10,000 MB
100 GB100,000 MB
500 GB500,000 MB
1,000 GB1,000,000 MB
5,000 GB5,000,000 MB
10,000 GB10,000,000 MB
50,000 GB50,000,000 MB
100,000 GB100,000,000 MB
500,000 GB500,000,000 MB

Tips & common mistakes

Quick tips

  • SI: 1 GB = 1000 MB = 10⁹ B. Binary GiB = 2³⁰ B.
  • Hard drives use SI; OS may show binary — discrepancy ~7%.
  • Mobile data plans: SI GB.

Avoid these

  • Expecting 64 GB drive to hold 64 × 1,073,741,824 B — it's 64 × 10⁹ B (7% less by binary measure).
  • Confusing GB with Gb (gigabit, 1/8).
  • Mixing GB and GiB without noting the discrepancy.

Frequently asked questions

How many megabytes in a gigabyte?
One gigabyte equals 1,000 megabytes.
How do I convert gigabytes to megabytes?
Multiply the gigabyte value by 1,000 to get the equivalent in megabytes.
What is 100 gigabytes in megabytes?
100 gigabytes equals 100,000 megabytes.
Is a gigabyte bigger than a megabyte?
Yes. 1 gigabyte equals 1,000 megabytes, so one gigabyte is larger.
How to convert gigabytes to megabytes without a calculator?
Multiply by 1,000 for a quick estimate; use a calculator for precise results.

Related data conversions

📊 See full comparison matrix →

More from Gigabyte

GB → b
1 = 8,000,000,000 b
GB → B
1 = 1,000,000,000 B
GB → KB
1 = 1,000,000 KB
GB → TB
1 = 0.001 TB
GB → PB
1 = 1.0000e-6 PB
GB → Mbps
1 = 8,000 Mbps

More to Megabyte

b → MB
1 = 1.2500e-7 MB
B → MB
1 = 1.0000e-6 MB
KB → MB
1 = 0.001 MB
TB → MB
1 = 1,000,000 MB
PB → MB
1 = 1,000,000,000 MB
Mbps → MB
1 = 0.125 MB

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