Storage Unit Converter (GB vs GiB)
Convert storage sizes between decimal and binary units.
Your numbers
Your results
Bytes
Bytes
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GB (10⁹ bytes)
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GiB (2³⁰ bytes)
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TB (10¹² bytes)
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TiB (2⁴⁰ bytes)
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GiB as % of GB
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Storage Unit Converter (GB vs GiB) by TheCalcTools
How the Storage Unit Converter (GB vs GiB) works
Enter a size and its unit.
The calculator converts it to bytes using exact factors: 1 KB = 1,000 bytes, 1 KiB = 1,024 bytes.
It then divides by each unit.
The formula
1 GB = 1,000,000,000 bytes1 GiB = 1,073,741,824 bytes
Worked example
Using the default values shown in the calculator:
| Value | 500 |
|---|---|
| Unit | GB |
- 500 GB = 500,000,000,000 bytes.
- Divided by 1,073,741,824 that is 465.6613 GiB.
- In terabytes: 0.5000 TB.
Result:
| Bytes | 500,000,000,000 |
|---|---|
| GB (10⁹ bytes) | 500.0000 |
| GiB (2³⁰ bytes) | 465.6613 |
| TB (10¹² bytes) | 0.5000 |
| TiB (2⁴⁰ bytes) | 0.4547 |
| GiB as % of GB | 93.13% |
Frequently asked questions
Why does my 500 GB drive show about 465 GB?
Drive makers use decimal GB (10⁹ bytes) while some operating systems report binary GiB (2³⁰ bytes) but label them GB. 500 GB is about 465.7 GiB.
Which standard defines the binary prefixes?
The IEC defined KiB, MiB, GiB and so on to remove the ambiguity.
Sources and further reading
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This calculator gives estimates for information only. Check important results independently before you rely on them. See our disclaimer.