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GB to Bytes Converter

Convert gigabytes (GB) to bytes (B) as you type — 1 GB = 1,000,000,000 B. Switch units, change the precision or copy the result.

How to use this tool

Steps for using the Unit Converter.

  1. Enter a value in From — gigabytes are already selected.
  2. The result in bytes appears instantly. Change either unit to convert to anything else in data storage.
  3. Use the swap button for the reverse conversion, and set the decimal places you need.
  4. Turn on Show formula to see the calculation, then copy or share the result.

Example

1 GB to B

Gigabyte
1 GB
Byte
B = 1 × 1000000000 = 1,000,000,000 B

Common use cases

  • Storage and file sizes.
  • Explaining drive capacities shown by Windows.
  • Memory limits and quotas in cloud and container configs.

GB to Bytes conversion table

gigabytes to bytes
Gigabyte (GB)Byte (B)
1 GB1,000,000,000 B
2 GB2,000,000,000 B
4 GB4,000,000,000 B
8 GB8,000,000,000 B
16 GB16,000,000,000 B
32 GB32,000,000,000 B
64 GB64,000,000,000 B
gigabytes to bytes (continued)
Gigabyte (GB)Byte (B)
128 GB128,000,000,000 B
256 GB256,000,000,000 B
500 GB500,000,000,000 B
512 GB512,000,000,000 B
1,000 GB1,000,000,000,000 B
1,024 GB1,024,000,000,000 B

Values rounded to 6 decimal places.

Related conversions

The units

Gigabyte (GB)
10⁹ bytes. Part of the SI system.
Byte (B)
8 bits.

How to convert gigabytes to bytes

Exact byte counts for storage quotas, APIs and file systems: 1 GB is exactly 1,000,000,000 bytes.

To convert gigabytes to bytes, use B = GB × 1000000000. One gigabyte equals 1,000,000,000 bytes, and one byte equals 1e-9 gigabytes.

Gigabyte (GB): 10⁹ bytes. Byte (B): 8 bits.

All digital information units are on the data storage converter.

Limitations

  • Results are rounded to the decimal places you choose; the calculation itself keeps full precision.

Frequently asked questions

How many bytes are in a gigabyte?

1 GB = 1,000,000,000 B. Multiply gigabytes by 1000000000 (or use B = GB × 1000000000).

How do I convert gigabytes to bytes?

Use B = GB × 1000000000. For example, 1 GB = 1,000,000,000 B and 2 GB = 2,000,000,000 B.

Is 1 GB 1,000 MB or 1,024 MB?

In SI units 1 GB = 1,000 MB. 1,024 is the binary relationship: 1 GiB = 1,024 MiB. Both are offered here, kept separate.

Why does my 1 TB drive show 931 GB?

The drive has 10¹² bytes; Windows divides by 1024³ and labels the result “GB”, giving 931 (really GiB).