The gigabyte
The gigabyte (GB) equals 1,000,000,000 bytes. The difference between GB (decimal) and GiB (binary, 1,073,741,824 B) is the reason a '1 TB' drive shows as ~931 GB in Windows.
Gigabytes to Bytes Converter
1 GB = 1000000000 B (gigabyte → byte)
1 GB = 1000000000 B
1 gigabyte equals 1000000000 bytes. To convert gigabytes to bytes, multiply the gigabyte value by 1000000000. For quick reference: 1 GB = 1000000000 B, 5 GB = 5000000000 B, 10 GB = 10000000000 B, 100 GB = 100000000000 B.
Formula
Bytes = Gigabytes × 1000000000Quick
When to use gigabytes → bytes
Gigabytes to bytes multiplies by 1 000 000 000. Database engines, backup tools, and storage APIs frequently require an exact byte count even when the human-facing plan is quoted in GB — provisioning 'a 50 GB volume' in an infrastructure-as-code template usually means passing 50 000 000 000 (decimal) or 53 687 091 200 (if the platform actually means GiB) as the raw byte parameter, and picking the wrong one silently under- or over-provisions.
Infrastructure engineers hit this constantly when writing provisioning code: requesting a 100 GB volume from a cloud API usually means passing 100,000,000,000 as the byte parameter under the decimal convention, but some platforms silently expect GiB (107,374,182,400 bytes) instead — picking the wrong one either under-provisions a disk that then fills unexpectedly or over-provisions and inflates the bill, and the API rarely warns which convention it's using.
How to convert gigabytes to bytes
Take your value
Start with your value in gigabytes.
Multiply by 1000000000
Multiply the gigabyte value by 1000000000. This is the exact conversion factor from gigabytes to bytes.
Read the result
The product is your value in bytes. For example, 5 GB × 1000000000 = 5000000000 B.
Conversion formula
The exact factor from gigabytes to bytes is 1000000000.
Bytes = Gigabytes × 1000000000
Gigabytes to Bytes conversion table
Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.
| Gigabytes (GB) | Bytes (B) |
|---|---|
| 1 GB | 1000000000 B |
| 8 GB | 8000000000 B |
| 16 GB | 16000000000 B |
| 64 GB | 64000000000 B |
| 100 GB | 100000000000 B |
| 256 GB | 256000000000 B |
| 500 GB | 500000000000 B |
| 512 GB | 512000000000 B |
| 1000 GB | 1000000000000 B |
| 1024 GB | 1024000000000 B |
| 2000 GB | 2000000000000 B |
| 2048 GB | 2048000000000 B |
| 4096 GB | 4096000000000 B |
| 5000 GB | 5000000000000 B |
| 8192 GB | 8192000000000 B |
| 10000 GB | 10000000000000 B |
| 16384 GB | 16384000000000 B |
| 25000 GB | 25000000000000 B |
| 32768 GB | 32768000000000 B |
| 50000 GB | 50000000000000 B |
| 65536 GB | 65536000000000 B |
| 100000 GB | 100000000000000 B |
| 131072 GB | 131072000000000 B |
| 250000 GB | 250000000000000 B |
| 500000 GB | 500000000000000 B |
| 524288 GB | 524288000000000 B |
| 1000000 GB | 1.0000 × 10^15 B |
| 1048576 GB | 1.0486 × 10^15 B |
| 2000000 GB | 2.0000 × 10^15 B |
| 5000000 GB | 5.0000 × 10^15 B |
| 10000000 GB | 1.0000 × 10^16 B |
| 50000000 GB | 5.0000 × 10^16 B |
| 100000000 GB | 1.0000 × 10^17 B |
| 500000000 GB | 5.0000 × 10^17 B |
| 1000000000 GB | 1.0000 × 10^18 B |
| 2000000000 GB | 2.0000 × 10^18 B |
| 5000000000 GB | 5.0000 × 10^18 B |
| 10000000000 GB | 1.0000 × 10^19 B |
| 50000000000 GB | 5.0000 × 10^19 B |
| 100000000000 GB | 1.0000 × 10^20 B |
| 500000000000 GB | 5.0000 × 10^20 B |
| 1000000000000 GB | 1.0000 × 10^21 B |
| 2000000000000 GB | 2.0000 × 10^21 B |
| 5000000000000 GB | 5.0000 × 10^21 B |
| 10000000000000 GB | 1.0000 × 10^22 B |
| 100000000000000 GB | 1.0000 × 10^23 B |
| 1000000000000000 GB | 1.0000 × 10^24 B |
| 10000000000000000 GB | 1.0000 × 10^25 B |
| 100000000000000000 GB | 1.0000 × 10^26 B |
| 1000000000000000000 GB | 1.0000 × 10^27 B |
Real-world reference
A standard-definition movie is around 1–2 GB. Phones and laptops typically ship with 128 GB to 2 TB of storage.
Frequently asked questions
- How many bytes are in 1 gigabyte?
- 1 gigabyte equals 1000000000 bytes.
- How do I convert gigabytes to bytes?
- Multiply the gigabyte value by 1000000000. So x GB × 1000000000 = the equivalent in B.
- What is 5 gigabytes in bytes?
- 5 gigabytes equals 5000000000 bytes.
- What is 10 gigabytes in bytes?
- 10 gigabytes equals 10000000000 bytes.
- What is 100 gigabytes in bytes?
- 100 gigabytes equals 100000000000 bytes.
- How do I convert back from bytes to gigabytes?
- Multiply the byte value by 1.0000 × 10^−9. For example, 1 B = 1.0000 × 10^−9 GB.
- Is the gigabyte bigger than the byte?
- Yes. 1 gigabyte is larger than 1 byte — specifically 1000000000 times larger.
- Are these conversion factors exact?
- The factor is derived directly from the SI definitions of gigabyte and byte; the displayed value is rounded for readability, and the browser computes using IEEE 754 double-precision arithmetic.
About the gigabyte and the byte
The byte
A byte is 8 bits — the smallest addressable unit on virtually every modern computer. ASCII text is one byte per character; UTF-8 ranges from 1 to 4 bytes per character.