GB to GiB Converter
Explains the gap between advertised drive sizes (decimal GB) and the sizes many operating systems report (binary GiB).
1 GB = 0.9313 GiB
gibibytes
1 GB = 0.9313 GiB
How to convert gigabytes to gibibytes
Divide the number of gigabytes by 1.073741824.
Formula
GiB = GB ÷ 1.073741824
For a quick estimate, multiply by about 0.931323.
Examples
- 256 GB ÷ 1.073741824 = 238.4186 GiB
- 500 GB ÷ 1.073741824 = 465.6613 GiB
- 1,000 GB ÷ 1.073741824 = 931.3226 GiB
Gigabytes to gibibytes conversion table
| Gigabytes (GB) | Gibibytes (GiB) |
|---|---|
| 1 | 0.9313 |
| 8 | 7.4506 |
| 16 | 14.9012 |
| 32 | 29.8023 |
| 64 | 59.6046 |
| 120 | 111.7587 |
| 128 | 119.2093 |
| 250 | 232.8306 |
| 256 | 238.4186 |
| 500 | 465.6613 |
| 512 | 476.8372 |
| 1,000 | 931.3226 |
| 2,000 | 1,862.6451 |
| 4,000 | 3,725.2903 |
Values rounded to 4 decimal places or 4 significant digits.
About gigabytes
A gigabyte (GB) is 1,000,000,000 bytes. Drive and phone manufacturers use this decimal gigabyte, while Windows reports sizes in binary units but labels them "GB". That is why a 1 TB drive shows up as about 931 GB.
About gibibytes
A gibibyte (GiB) is 1,024 MiB, or 1,073,741,824 bytes, about 7.4% more than a decimal gigabyte. Computer memory (RAM) comes in binary sizes such as 16 GiB, usually marketed as "16 GB".
Frequently asked questions
How many gibibytes are in one gigabyte?
One gigabyte equals 0.9313 gibibytes (rounded).
How do I convert gigabytes to gibibytes?
Divide the number of gigabytes by 1.073741824. For example: 500 GB ÷ 1.073741824 = 465.6613 GiB.
How many gigabytes are in one gibibyte?
One gibibyte equals 1.0737 gigabytes.
Is the GB to GiB conversion exact?
Yes. The factor follows directly from the official definitions of both units, so the only rounding is in how many decimals are displayed.