Mbps to GB/s converter
To convert Mbps to GB/s, divide by 8,000. A 10,000 Mbps (10 Gbps) link moves at most 1.25 GB/s, and a 40,000 Mbps link at most 5 GB/s.
Tip: paste a reading like “12.4 MB/s” and the unit is picked for you.
1 Mbps equals:
- bps1,000,000
- kbps1,000
- Mbps1
- Gbps0.001
- B/s125,000
- kB/s125
- MB/s0.125
- GB/s0.000125
- MiB/s0.119209
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Formula
1 Mbps = 1,000,000 bits and 1 GB/s = 8,000,000,000 bits, so:
Common conversions
| Mbps | GB/s |
|---|---|
| 100 Mbps | 0.0125 GB/s |
| 500 Mbps | 0.0625 GB/s |
| 1,000 Mbps | 0.125 GB/s |
| 2,500 Mbps | 0.3125 GB/s |
| 5,000 Mbps | 0.625 GB/s |
| 10,000 Mbps | 1.25 GB/s |
| 25,000 Mbps | 3.125 GB/s |
| 40,000 Mbps | 5 GB/s |
| 100,000 Mbps | 12.5 GB/s |
Examples: link speed to copy speed
This conversion answers a practical question for servers, workstations and storage: how many gigabytes per second can this link carry, and how long will a big copy take?
- 10 GbE between servers. 10,000 Mbps ÷ 8,000 = 1.25 GB/s. Moving 1 TB takes at least 800 seconds (13 min 20 s), and a little longer in practice.
- A 25,000 Mbps datacenter link. 3.125 GB/s at most. A single SATA or network-attached array may not be able to fill it, so the storage becomes the limit.
- Thunderbolt 3/4. The 40 Gbps (40,000 Mbps) signalling rate works out to 5 GB/s. That is a nominal figure for the whole link; the data a single drive gets is lower.
The file transfer time calculator has presets for these links and an efficiency setting for realistic copy times.
Pitfall: nominal link rate vs file copy rate
Interface rates are signalling rates. Framing, TCP/IP headers and the file protocol all take a share, and the disks at each end must keep up. A good 10 GbE copy that reports around 1.1 GB/s is running at 88% of the nominal rate, which is normal. If your tool reports GiB/s, remember that 1 GiB/s is 1,073,741,824 bytes per second, so 1.25 GB/s shows as about 1.16 GiB/s.
To convert a storage benchmark back into network terms, use GB/s to Mbps. For plan-sized speeds, Mbps to MB/s is easier to read, and Mbps to Gbps stays in bits if you only need to rescale.
Frequently asked questions
How many GB/s is 10 Gbps?
10 Gbps is 1.25 GB/s. Divide gigabits per second by 8 to get gigabytes per second.
How long does it take to copy 1 TB over 10 GbE?
At the full 1.25 GB/s it takes 800 seconds, or 13 minutes 20 seconds. With realistic efficiency around 90%, plan for roughly 15 minutes, assuming both drives keep up.
How many Mbps do I need for 1 GB/s?
8,000 Mbps. A 10 Gbps link can deliver that; a 2.5 Gbps or 5 Gbps link cannot.