Mbps to kB/s converter
To convert Mbps to kB/s, multiply by 1,000 and divide by 8, which is the same as multiplying by 125. A 10 Mbps connection tops out at 1,250 kB/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 kB/s = 8,000 bits, so:
Common conversions
| Mbps | kB/s |
|---|---|
| 0.5 Mbps | 62.5 kB/s |
| 1 Mbps | 125 kB/s |
| 2 Mbps | 250 kB/s |
| 5 Mbps | 625 kB/s |
| 10 Mbps | 1,250 kB/s |
| 25 Mbps | 3,125 kB/s |
| 50 Mbps | 6,250 kB/s |
| 100 Mbps | 12,500 kB/s |
Why a 10 Mbps line shows about 1,250 kB/s
On slower connections, download windows switch to kilobytes per second, and the number looks nothing like the speed on your bill. Nothing is wrong: 10 Mbps is 10,000 kbps, and dividing by 8 bits per byte gives 1,250 kB/s. After protocol overhead, readings of roughly 1,100 to 1,200 kB/s are normal on a clean 10 Mbps line.
If the app counts in binary kilobytes (KiB, 1,024 bytes), the same ceiling appears as about 1,220.7 KiB/s. Apps sometimes print that as "KB/s", which is why two tools can disagree by a couple of percent on the same download.
Examples on slower links
- Rural or satellite broadband at 5 Mbps. Expect no more than 625 kB/s. A 100 MB update needs at least 160 seconds.
- A 2 Mbps mobile connection. The download bar should read up to 250 kB/s. Seeing 240 kB/s means the connection is almost fully used.
- A 0.5 Mbps throttled plan. After a mobile data allowance runs out, a 0.5 Mbps cap means about 62.5 kB/s at best.
To check a kB/s reading in the other direction, use kB/s to Mbps. If you want kilobits instead of kilobytes, for example to compare with an encoder setting, Mbps to kbps is the right page. For faster plans, Mbps to MB/s gives more readable numbers, and the download time calculator turns any speed into a finish time.
Frequently asked questions
How many kB/s is 1 Mbps?
1 Mbps is 125 kB/s. One megabit is 1,000 kilobits, and 1,000 ÷ 8 = 125 kilobytes.
My 10 Mbps connection only downloads at 1,150 kB/s. Is that normal?
Yes. The ceiling is 1,250 kB/s, and 1,150 kB/s is 9.2 Mbps, or 92% of the plan. Protocol overhead accounts for the difference.
What is 1 Mbps in KiB/s?
About 122.07 KiB/s. 1 Mbps is 125,000 bytes per second, and 125,000 ÷ 1,024 = 122.07.