Quick Answer: Gigabytes to Gibibytes
One gigabyte is approximately 0.9313 gibibytes (1 GB ≈ 0.9313 GiB).
Conversely, 1 GiB ≈ 1.074 GB.
Formula: GiB = GB × 10⁹ ÷ 1024³
Worked examples
- 1 GB ≈ 0.9313 GiB
- 2 GB ≈ 1.863 GiB
- 4 GB ≈ 3.725 GiB
Method and limitations
A gigabyte is 10⁹ = 1,000,000,000 bytes (SI decimal prefix G). A gibibyte is 2³⁰ = 1,073,741,824 bytes (IEC binary prefix Gi). GiB = GB × 10⁹ ÷ 2³⁰, so 1 GB ≈ 0.9313 GiB. The byte count does not change; only the unit used to express it does. Calculations use full-precision constants; answers in this box are rounded for readability (≈ marks a rounded value) and the calculator shows up to 9 significant figures. GB is decimal (10⁹ bytes, SI prefix) and GiB is binary (2³⁰ = 1,073,741,824 bytes, IEC prefix). The byte count is the same; a tool that divides by 1024³ but labels the result "GB" is really showing GiB.
Each factor is exact by definition, derived from exact definitions, or a documented conventional value — see the methodology and sources.
Conversion Formula
A gigabyte is 10⁹ = 1,000,000,000 bytes (SI decimal prefix G). A gibibyte is 2³⁰ = 1,073,741,824 bytes (IEC binary prefix Gi). GiB = GB × 10⁹ ÷ 2³⁰, so 1 GB ≈ 0.9313 GiB. The byte count does not change; only the unit used to express it does.
Complete Guide to Gigabytes to Gibibytes Conversion
What is a gigabyte?
A gigabyte (GB) is exactly 10⁹ bytes. G is the SI decimal prefix, a power of 1000, as in gigawatt or gigahertz.
What is a gibibyte?
A gibibyte (GiB) is exactly 2³⁰ = 1,073,741,824 bytes. Gi is an IEC binary prefix (IEC 80000-13), a power of 1024.
How the Conversion Works
Multiply by 10⁹ to get bytes, then divide by 2³⁰. Both factors are exact.
Scientific Context
The BIPM SI Brochure states SI prefixes are powers of ten and must not be used for powers of two; IEC 80000-13 defines Ki, Mi, Gi and Ti for that purpose.
Step-by-Step Conversion Guide
Follow these steps to convert gigabytes to gibibytes manually:
Start with your value in gigabytes
Example: You want to convert 4 GB
Apply the conversion formula
Use the formula: GiB = GB × 10⁹ ÷ 1024³
Calculate the result
4 GB = 3.7253 GiB
Verify your answer
Use our calculator above to double-check your manual calculation.
Quick Mental Math Tip
Take off about 7%: 500 GB ≈ 465 GiB (exact 465.66).
Common Conversions
| Gigabytes (GB) | Gibibytes (GiB) | Gibibytes → Gigabytes |
|---|---|---|
| 1 GB | 0.931323 | 1 GiB = 1.07374 GB |
| 2 GB | 1.86265 | 2 GiB = 2.14748 GB |
| 4 GB | 3.72529 | 4 GiB = 4.29497 GB |
| 8 GB | 7.45058 | 8 GiB = 8.58993 GB |
| 16 GB | 14.9012 | 16 GiB = 17.1799 GB |
| 32 GB | 29.8023 | 32 GiB = 34.3597 GB |
| 64 GB | 59.6046 | 64 GiB = 68.7195 GB |
| 120 GB | 111.759 | 120 GiB = 128.849 GB |
| 128 GB | 119.209 | 128 GiB = 137.439 GB |
| 240 GB | 223.517 | 240 GiB = 257.698 GB |
| 256 GB | 238.419 | 256 GiB = 274.878 GB |
| 500 GB | 465.661 | 500 GiB = 536.871 GB |
| 512 GB | 476.837 | 512 GiB = 549.756 GB |
| 1000 GB | 931.323 | 1000 GiB = 1,073.74 GB |
| 1024 GB | 953.674 | 1024 GiB = 1,099.51 GB |
| 2000 GB | 1,862.65 | 2000 GiB = 2,147.48 GB |
Did You Know?
Data storage units follow a binary system (1024) in computing but a decimal system (1000) in marketing — this is why your "500 GB" drive shows less space.
When You'll Need This Conversion
Advertised vs reported capacity
Reproduce the figure software shows for a decimal capacity: 1 TB = 1,000 GB = 931.32 GiB.
Volumes and memory sizes
When a console mixes GB and GiB, convert before provisioning: 100 GiB = 107.37 GB.
Pro Tips for Accurate Conversions
Use bytes to settle a discrepancy
If two figures disagree, convert both to bytes. Equal byte counts mean only the prefix convention differs.
Common Mistakes to Avoid
Treating a reported figure as lost capacity
Devices are sold in decimal bytes; some software shows binary values under a decimal label.
Convert both figures to bytes or to the same unit before comparing.
Writing GiB values as GB
465.66 GiB and 465.66 GB are different byte counts.
Keep the label that matches the divisor: 10⁹ → GB, 2³⁰ → GiB.
Frequently Asked Questions
Related Guides & Articles
View allWant to learn more about data conversions?
Browse all data articles →People Also Convert
Related calculators users frequently visit alongside gigabytes to gibibytes.
Conversion factors on this page are either exact by definition, derived from exact definitions, or conventional values in documented use. Each is listed with its source in our conversion methodology and sources, which cites the BIPM SI Brochure, NIST Special Publication 811 and the relevant IEC or national standards. Results are rounded for display only; calculations use full precision.