Convert Gigabytes to Bytes (GB to B)
1 gigabyte (GB) = 1000000000 bytes (B). 1 B = 1 × 10⁻⁹ GB. Example: 15 GB = 15 × 1000000000 = 15000000000 B.
Also searched as gigabytes to B, gigabytes in B, gigabytes into bytes, GB to B, GB in bytes, GB into byte, gigabyte to byte, GB to bytes converter and how many bytes in a gigabyte.
1 GB = 1000000000 B
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk gigabyte to byte converter to paste a column from Excel.
How to Convert Gigabyte to Byte
- 1 GB = 1000000000 B
- 1 B = 1 × 10⁻⁹ GB
- Example: convert 15 GB to B: 15 GB = 15 × 1000000000 B = 15000000000 B
Formula
B = GB × 1000000000
Derivation from SI units:
- 1 GB = 10⁹ bytes = 8 × 10⁹ bits (decimal, SI).
- 1 byte = 8 bits (an octet).
- 1 GB = 8000000000 bit ÷ 8 bit per B = 1000000000 B
Both units are defined exactly, so the factor is exact. Gigabyte definition: gigabyte; Byte definition: byte.
Worked examples
- A reading of 16 GB converts to 16000000000 B.
16 GB × 1000000000 = 16000000000 B - A value of 128 GB is 128000000000 B.
128 GB × 1000000000 = 128000000000 B
Gigabyte to Byte conversion table
| Gigabytes (GB) | Bytes (B) |
|---|---|
| 1 GB | 1000000000 B |
| 2 GB | 2000000000 B |
| 4 GB | 4000000000 B |
| 8 GB | 8000000000 B |
| 16 GB | 16000000000 B |
| 32 GB | 32000000000 B |
| 64 GB | 64000000000 B |
| 100 GB | 100000000000 B |
| 128 GB | 128000000000 B |
| 256 GB | 256000000000 B |
| 500 GB | 500000000000 B |
| 1000 GB | 1000000000000 B |
Where it's used
Gigabytes are used for phone and laptop storage, while bytes appear in file and memory sizes. Both measure amount of digital information, so the conversion is a fixed factor.
Gigabyte to other data storage units
| Conversion | 1 GB equals |
|---|---|
| gigabyte to byte | 1000000000 B |
| gigabyte to kilobyte | 1000000 kB |
| gigabyte to megabyte | 1000 MB |
| gigabyte to terabyte | 0.001 TB |
| gigabyte to bit | 8000000000 bit |
| gigabyte to megabit | 8000 Mbit |
| gigabyte to kibibyte | 976562.5 KiB |
| gigabyte to mebibyte | 953.6743164 MiB |
Show 5 more units
| gigabyte to gibibyte | 0.9313225746 GiB |
|---|---|
| gigabyte to kilobit | 8000000 kbit |
| gigabyte to gigabit | 8 Gbit |
| gigabyte to petabyte | 0.000001 PB |
| gigabyte to tebibyte | 0.0009094947018 TiB |
Frequently asked questions
How many bytes are in 1 gigabyte?
1 GB = 1000000000 B.
How do I convert gigabytes to bytes?
Multiply the value in GB by 1000000000. For example, 15 GB × 1000000000 = 15000000000 B.
Is the GB to B conversion exact?
Yes. Both units are defined exactly, and 1 GB is exactly 1000000000 B.
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 7 (SI prefixes); hertz, Table 4.
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Gigabytes to Bytes (GB to B). Retrieved October 25, 2026, from https://scientificconverters.com/data-storage/gigabytes-to-bytes/
IEEE
Scientific Converters, "Convert Gigabytes to Bytes (GB to B)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/data-storage/gigabytes-to-bytes/