GiB to GB Converter
Convert gibibytes to gigabytes — the binary unit to the decimal one. Results update as you type; exact factors shown.
One gibibyte (2³⁰) is 1.0737 gigabyte (10⁹) — see the exact factor, not a rounded rule of thumb.
How the gib to gb converter works
Storage converts through the byte (8 bits). Drive makers and network speeds use decimal prefixes (1 GB = 10⁹ bytes); operating systems often report binary units (1 GiB = 2³⁰ = 1,073,741,824 bytes) — sometimes labelled "GB". The gap is 7.4% at the gigabyte and 10% at the terabyte.
The US uses customary units (US gallon, short ton, °F) in daily life; NIST SP 811 gives the exact SI factors.
Common data conversions
| From | To | Units |
|---|---|---|
| 1 GiB | 1.0737 GB | gibibyte (2³⁰) to gigabyte (10⁹) |
| 2 GiB | 2.1475 GB | gibibyte (2³⁰) to gigabyte (10⁹) |
| 4 GiB | 4.295 GB | gibibyte (2³⁰) to gigabyte (10⁹) |
| 8 GiB | 8.5899 GB | gibibyte (2³⁰) to gigabyte (10⁹) |
| 16 GiB | 17.1799 GB | gibibyte (2³⁰) to gigabyte (10⁹) |
| 32 GiB | 34.3597 GB | gibibyte (2³⁰) to gigabyte (10⁹) |
| 64 GiB | 68.7195 GB | gibibyte (2³⁰) to gigabyte (10⁹) |
| 100 GiB | 107.3742 GB | gibibyte (2³⁰) to gigabyte (10⁹) |
| 128 GiB | 137.439 GB | gibibyte (2³⁰) to gigabyte (10⁹) |
| 256 GiB | 274.8779 GB | gibibyte (2³⁰) to gigabyte (10⁹) |
| 512 GiB | 549.7558 GB | gibibyte (2³⁰) to gigabyte (10⁹) |
| 1,024 GiB | 1,099.5116 GB | gibibyte (2³⁰) to gigabyte (10⁹) |
Units in this converter and their exact factors
| Unit | Symbol | One unit in bytes |
|---|---|---|
| bit | bit | 0.125 byte |
| byte | B | 1 byte |
| kilobyte (10³) | kB | 1,000 byte |
| megabyte (10⁶) | MB | 1,000,000 byte |
| gigabyte (10⁹) | GB | 1,000,000,000 byte |
| terabyte (10¹²) | TB | 1,000,000,000,000 byte |
| kibibyte (2¹⁰) | KiB | 1,024 byte |
| mebibyte (2²⁰) | MiB | 1,048,576 byte |
| gibibyte (2³⁰) | GiB | 1,073,741,824 byte |
| tebibyte (2⁴⁰) | TiB | 1,099,511,627,776 byte |
FAQFrequently asked questions about data conversion
What is the difference between GiB and GB?
A GiB is 2³⁰ bytes (1,073,741,824); a GB is 10⁹ bytes (1,000,000,000). The GiB is about 7.4% larger.
Why does my 1 TB drive show 931 GB?
Because the maker counts decimal terabytes and the operating system displays binary tebibytes while labelling them "GB".
Which is correct?
Both, for their own definition. The confusion comes from Windows using decimal names for binary units.
What is 16 GiB in GB?
17.18 GB.
Where do the names come from?
The IEC introduced kibi, mebi and gibi in 1998 precisely to end this ambiguity. Adoption has been partial.
Where these figures come from
- BIPM — The International System of Units (SI Brochure, 9th edition) — definitions of the base and derived units.
- NIST Special Publication 811 — Guide for the Use of the International System of Units — the exact conversion factors used here.
- National Institute of Standards and Technology (NIST) — United States's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.