Gigabytes to gibibytes
Multiply gigabytes by 0.931323 to get gibibytes.
16 GB = 14.9012 GiB
How to convert gigabytes to gibibytes
The gibibyte is one binary gigabyte, 1024³ bytes (2³⁰ B) — what an OS often labels "GB". The gigabyte is one billion bytes (10⁹ B) in the decimal convention.
Worked example — 16 GB: 16 × 0.931323 = 14.9012 GiB.
Gigabytes to gibibytes table
| Gigabytes | Gibibytes |
|---|---|
| 1 GB | 0.931323 GiB |
| 2 GB | 1.8626 GiB |
| 4 GB | 3.7253 GiB |
| 8 GB | 7.4506 GiB |
| 16 GB | 14.9012 GiB |
| 32 GB | 29.8023 GiB |
| 64 GB | 59.6046 GiB |
| 128 GB | 119.2093 GiB |
| 256 GB | 238.4186 GiB |
Reverse and related
About gigabytes and gibibytes
Gigabyte (GB)
1 GB = 0.931323 GiBDefinition. One billion bytes (10⁹ B) in the decimal convention
History and origin
The gigabyte uses the metric giga prefix for a billion bytes. Drive makers label capacity in decimal gigabytes, while operating systems often report the binary gibibyte, which is why sizes seem to disagree.
Current use
Gigabytes measure phone storage, memory and mobile data plans.
Source: IEC 80000-13 (quantities and units — information science); NIST on binary prefixes
Gibibyte (GiB)
1 GiB = 1.0737 GBDefinition. One binary gigabyte, 1024³ bytes (2³⁰ B) — what an OS often labels "GB"
History and origin
The gibibyte was defined by the IEC in 1998 as the binary counterpart to the gigabyte, exactly 1024 to the third power bytes. It was introduced to end the confusion between decimal and binary sizes.
Current use
The gibibyte is what an operating system often shows when it labels a drive GB, which is why a 1 terabyte drive appears as about 931 gibibytes.
Source: IEC 80000-13 (quantities and units — information science); NIST on binary prefixes
Where people use this
Gigabytes: phone storage, mobile data plans. Gibibytes: reported drive capacity, RAM. 1 GB (decimal) is about 0.931 GiB (binary).
Every value is carried to full double precision; the display is rounded.
Both units are defined in IEC 80000-13 (quantities and units — information science); NIST on binary prefixes.
Questions people ask
What is the difference between GB and GiB?
A gigabyte is a billion bytes (decimal); a gibibyte is the binary version, about 7% larger, so 1 GB is about 0.931 GiB.
How many GiB is 8 GB?
8 GB (decimal) is about 7.45 GiB.
Why do reported sizes look smaller?
Storage is sold in decimal GB but reported by the OS in binary GiB, so the number shown is a few percent lower.