Quick Answer: Gigabytes to Gigabits
One gigabyte equals 8 gigabits (1 GB = 8 Gb).
Conversely, 1 Gb = 0.125 GB.
Formula: Gb = GB × 8
Worked examples
- 1 GB = 8 Gb
- 5 GB = 40 Gb
- 10 GB = 80 Gb
Method and limitations
To convert gigabytes to gigabits, multiply by 8. Calculations use full-precision constants; displayed values are rounded to at most 9 significant figures. Results are rounded for display only. Full precision is kept internally, so long chains of conversions do not accumulate rounding error. Where US customary and imperial units share a name (for example fluid ounces and gallons), this page uses the US customary definition and says so explicitly.
Each factor is exact by definition, derived from exact definitions, or a documented conventional value — see the methodology and sources.
Conversion Formula
To convert gigabytes to gigabits, multiply by 8.
Step-by-Step Conversion Guide
Follow these steps to convert gigabytes to gigabits manually:
Start with your value in gigabytes
Example: You want to convert 10 GB
Apply the conversion formula
Use the formula: Gb = GB × 8
Calculate the result
10 GB = 80 Gb
Verify your answer
Use our calculator above to double-check your manual calculation.
Quick Mental Math Tip
To convert gigabytes to gigabits, multiply by 8.
Common Conversions
| Gigabytes (GB) | Gigabits (Gb) | Gigabits → Gigabytes |
|---|---|---|
| 1 GB | 8 | 1 Gb = 0.125 GB |
| 5 GB | 40 | 5 Gb = 0.625 GB |
| 10 GB | 80 | 10 Gb = 1.25 GB |
| 25 GB | 200 | 25 Gb = 3.125 GB |
| 50 GB | 400 | 50 Gb = 6.25 GB |
| 100 GB | 800 | 100 Gb = 12.5 GB |
| 500 GB | 4,000 | 500 Gb = 62.5 GB |
| 1000 GB | 8,000 | 1000 Gb = 125 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.
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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.