How many bytes are in 1 gigabyte?

1 gigabyte equals 1000000000 B.

How do I convert bytes back to gigabytes?

Use the reverse converter: 1 byte equals 1e-9 GB.

Is this converter accurate?

Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.

128 gigabytes to bytes (128 GB to B)

Open the full gigabytes to bytes converter

Formula

To convert gigabytes to bytes, multiply the value by 1000000000.

B = GB × 1000000000

How to convert 128 GB to B

128 GB × 1000000000 = 128000000000 B

Values near 128 GB

gigabytes → bytes
GB	B
118	118000000000.0000
119	119000000000.0000
120	120000000000.0000
121	121000000000.0000
122	122000000000.0000
123	123000000000.0000
124	124000000000.0000
125	125000000000.0000
126	126000000000.0000
127	127000000000.0000
128	128000000000.0000
129	129000000000.0000
130	130000000000.0000
131	131000000000.0000
132	132000000000.0000
133	133000000000.0000
134	134000000000.0000
135	135000000000.0000
136	136000000000.0000
137	137000000000.0000
138	138000000000.0000

Decimal vs binary: KB, MB and GB use powers of 1,000 (SI), while KiB, MiB and GiB use powers of 1,024. Storage makers use decimal units; many operating systems and memory sizes use binary ones, which is why a "500 GB" drive shows less space.

About the units

Gigabyte (GB): 1,000,000,000 bytes in the decimal system, used for drive capacity and data plans.
Byte (B): Eight bits, the basic unit of computer storage and the size of one character in many encodings.

Frequently asked questions

How do I convert gigabytes to bytes?: To convert gigabytes to bytes, multiply the value by 1000000000.
How many bytes are in 1 gigabyte?: 1 gigabyte equals 1000000000 B.
How many bytes are in 10 gigabytes?: 10 GB equals 10000000000 B.
How do I convert bytes back to gigabytes?: Use the reverse converter: 1 byte equals 1e-9 GB.
Is this converter accurate?: Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.