Gigabits per Second to Kilobytes per Second (Gbps to kB/s)
1 gigabit per second (Gbps) = 125000 kilobytes per second (kB/s). 1 kB/s = 0.000008 Gbps. Example: 15 Gbps = 15 × 125000 = 1875000 kB/s.
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1 Gbps = 125000 kB/s
Type in either box. Scientific notation works: 1.5e-3.
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How to Convert Gigabit per Second to Kilobyte per Second
- 1 Gbps = 125000 kB/s
- 1 kB/s = 0.000008 Gbps
- Example: convert 15 Gbps to kB/s: 15 Gbps = 15 × 125000 kB/s = 1875000 kB/s
Formula
kB/s = Gbps × 125000
Derivation from SI units:
- 1 Gbit/s = 10⁹ bit/s.
- 1 kB/s = 1000 B/s = 8000 bit/s.
- 1 Gbps = 1000000000 bps ÷ 8000 bps per kB/s = 125000 kB/s
Both units are defined exactly, so the factor is exact. Gigabit per Second definition: gigabit per second; Kilobyte per Second definition: kilobyte per second.
Worked examples
- A reading of 5 Gbps converts to 625000 kB/s.
5 Gbps × 125000 = 625000 kB/s - A value of 40 Gbps is 5000000 kB/s.
40 Gbps × 125000 = 5000000 kB/s
Gigabit per Second to Kilobyte per Second conversion table
| Gigabits per Second (Gbps) | Kilobytes per Second (kB/s) |
|---|---|
| 1 Gbps | 125000 kB/s |
| 2.5 Gbps | 312500 kB/s |
| 5 Gbps | 625000 kB/s |
| 10 Gbps | 1250000 kB/s |
| 25 Gbps | 3125000 kB/s |
| 40 Gbps | 5000000 kB/s |
| 100 Gbps | 12500000 kB/s |
| 400 Gbps | 50000000 kB/s |
Where it's used
Gigabits per Second are used for ethernet and fibre links, while kilobytes per second appear in download speeds on slow links. Both measure data transfer rate (bandwidth), so the conversion is a fixed factor.
Gigabit per Second to other data transfer rate units
| Conversion | 1 Gbps equals |
|---|---|
| gigabit per second to kilobyte per second | 125000 kB/s |
| gigabit per second to megabit per second | 1000 Mbps |
| gigabit per second to megabyte per second | 125 MB/s |
| gigabit per second to kilobit per second | 1000000 kbps |
| gigabit per second to gigabyte per second | 0.125 GB/s |
| gigabit per second to bit per second | 1000000000 bps |
| gigabit per second to byte per second | 125000000 B/s |
| gigabit per second to mebibyte per second | 119.2092896 MiB/s |
Show 2 more units
| gigabit per second to terabit per second | 0.001 Tbps |
|---|---|
| gigabit per second to kibibyte per second | 122070.3125 KiB/s |
Frequently asked questions
How many kilobytes per second are in 1 gigabit per second?
1 Gbps = 125000 kB/s.
How do I convert gigabits per second to kilobytes per second?
Multiply the value in Gbps by 125000. For example, 15 Gbps × 125000 = 1875000 kB/s.
Is the Gbps to kB/s conversion exact?
Yes. Both units are defined exactly, and 1 Gbps is exactly 125000 kB/s.
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 7 (SI prefixes); hertz, Table 4.
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Gigabits per Second to Kilobytes per Second (Gbps to kB/s). Retrieved October 25, 2026, from https://scientificconverters.com/data-rate/gigabits-per-second-to-kilobytes-per-second/
IEEE
Scientific Converters, "Gigabits per Second to Kilobytes per Second (Gbps to kB/s)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/data-rate/gigabits-per-second-to-kilobytes-per-second/