How many gigabytes are in one byte?

There are 1 × 10⁻⁹ gigabytes in 1 byte.

How do you convert gigabytes to bytes?

Multiply the number of gigabytes by 1,000,000,000 — or use the formula B = GB × 1,000,000,000.

What is 32 gigabytes in bytes?

32 gigabytes is 32,000,000,000 bytes. 32 × 1,000,000,000 = 32,000,000,000 bytes.

Is the gigabytes to bytes conversion exact?

Yes. The relationship is fixed by definition, so 1,000,000,000 is an exact conversion factor — only the displayed result is rounded.

Gigabytes to Bytes Converter

Convert gigabytes to bytes instantly with this free gigabytes to bytes converter. Enter any value to get an accurate data storage conversion, plus the formula, the conversion factor and a full reference table.

What is 1 gigabyte in bytes?

1 gigabyte is equal to exactly 1,000,000,000 bytes.

1 × 1,000,000,000 = 1,000,000,000 bytes

Amount

Result1,000,000,000

1 gigabyte = 1,000,000,000 bytes

Gigabytes to Bytes formula

B = GB × 1,000,000,000

The gigabytes to bytes conversion factor is 1,000,000,000, which is exact by definition. 1 gigabyte = 1,000,000,000 bytes, and 1 byte = 1 × 10⁻⁹ gigabytes.

Worked examples

2 gigabytes = 2,000,000,000 bytes — 2 × 1,000,000,000 = 2,000,000,000 bytes
32 gigabytes = 32,000,000,000 bytes — 32 × 1,000,000,000 = 32,000,000,000 bytes
256 gigabytes = 256,000,000,000 bytes — 256 × 1,000,000,000 = 256,000,000,000 bytes

Gigabytes to Bytes conversion table

Every value below is calculated with the exact conversion factor and rounded for display.

gigabytes to bytes conversion table
Gigabytes (GB)	Bytes (B)
1 GB	1,000,000,000 B
2 GB	2,000,000,000 B
4 GB	4,000,000,000 B
8 GB	8,000,000,000 B
16 GB	16,000,000,000 B
32 GB	32,000,000,000 B
64 GB	64,000,000,000 B
100 GB	100,000,000,000 B
128 GB	128,000,000,000 B
256 GB	256,000,000,000 B
512 GB	512,000,000,000 B
1,000 GB	1,000,000,000,000 B
1,024 GB	1,024,000,000,000 B
2,048 GB	2,048,000,000,000 B

When you need to convert gigabytes to bytes

Checking whether a file fits inside a storage or upload limit.
Working out how much of a mobile data allowance a download will use.
Reconciling the capacity printed on a drive with the smaller figure the operating system reports.

Getting a feel for the scale

A converted number is easier to trust when you can picture it. These reference points let you sanity-check the result at a glance.

Gigabyte (GB)

An hour of HD streaming uses about 3 GB
A modern phone photo library is tens of GB

Common mistakes to avoid

Dividing when you should multiply. Because 1 gigabyte = 1,000,000,000 bytes, the answer should be larger than the number you started with.
Treating 1 kB as 1,024 bytes. Storage and network figures use decimal units of 1,000; operating systems usually report binary units of 1,024, which is why a 1 TB drive shows as about 931 GiB.
Rounding too early. Convert first at full precision, then round the final answer to the precision the task actually needs.

How precise does the answer need to be?

Round to two decimals for human-readable sizes. When you are checking a hard limit, use the exact figure: a file 0.4% over an upload cap still fails.

How these units are defined

Gigabyte (GB): 1,000,000,000 bytes in decimal (SI) notation. This unit's relationship to the SI base unit is exact by definition, so no rounding enters the conversion factor.
Byte (B): Eight bits. This unit's relationship to the SI base unit is exact by definition, so no rounding enters the conversion factor.

Frequently asked questions

What is 1 gigabyte in bytes?: 1 gigabyte is equal to 1,000,000,000 bytes.
How many gigabytes are in one byte?: There are 1 × 10⁻⁹ gigabytes in 1 byte.
How do you convert gigabytes to bytes?: Multiply the number of gigabytes by 1,000,000,000 — or use the formula B = GB × 1,000,000,000.
What is 32 gigabytes in bytes?: 32 gigabytes is 32,000,000,000 bytes. 32 × 1,000,000,000 = 32,000,000,000 bytes.
Is the gigabytes to bytes conversion exact?: Yes. The relationship is fixed by definition, so 1,000,000,000 is an exact conversion factor — only the displayed result is rounded.