Convert Gibibytes (GiB) to Gigabytes (GB)
1 GiB = 1.073741824 GB Two-way converter below, type in either field.
Formula
GB = GiB × 1.073741824 (1 GiB = 1024³ bytes, 1 GB = 1000³ bytes)
Why this matters
GiB (gibibyte) counts in powers of 1,024; GB (gigabyte) counts in powers of 1,000. The ~7.4% gap between them explains why a "512 GB" SSD appears as ~477 GB in Windows: Windows measures in GiB but labels the result GB. RAM is conventionally binary (a "16 GB" DIMM is 16 GiB); drives and bandwidth are decimal.
GiB to GB reference table
| Gibibytes (GiB) | Gigabytes (GB) |
|---|---|
| 0.5 | 0.537 |
| 1 | 1.074 |
| 2 | 2.147 |
| 4 | 4.295 |
| 8 | 8.59 |
| 16 | 17.18 |
| 32 | 34.36 |
| 64 | 68.719 |
| 128 | 137.439 |
| 256 | 274.878 |
| 512 | 549.756 |
Frequently asked questions
What is the difference between GiB and GB?
1 GiB = 1,073,741,824 bytes (1024³); 1 GB = 1,000,000,000 bytes (1000³). A GiB is about 7.4% larger than a GB. The IEC defined GiB in 1998 precisely to end the ambiguity.
Why does Windows show my 1 TB drive as 931 GB?
Windows computes size in binary units (931 GiB) but prints the label "GB". 1 TB decimal = 931.3 GiB. Both numbers describe the same bytes.
Is RAM measured in GB or GiB?
RAM is physically built in powers of two, so a "16 GB" memory kit is really 16 GiB (17.18 GB decimal). Convention just never switched labels.
More data-unit converters
- Megabytes → Gigabytes GB = MB ÷ 1,000
- Gigabytes → Terabytes TB = GB ÷ 1,000
- Kilobytes → Megabytes MB = kB ÷ 1,000
- Megabits per second → Megabytes per second MB/s = Mbps ÷ 8