8 bits make 1 byte. Lowercase b means bits; uppercase B means bytes.
Data & storage
Bits & Bytes Converter
Switch between Mbps, MB/s, Kbps and KB/s in one go, and finally see why bits and bytes confuse everybody.
Short answer: 8 bits make 1 byte. Lowercase b is bits, uppercase B is bytes. To go from Mbps to MB/s, divide by 8, and to go back, multiply by 8.
Why does it matter?
Because the two labels sit side by side everywhere. Your internet plan says 200 Mbps and your download shows 25 MB/s, and it looks like you are being short-changed by a factor of eight. You are not, it is the same speed written in two units.
Quick table
| Mbps | MB/s | Kbps | KB/s |
|---|---|---|---|
| 8 | 1 | 8,000 | 1,000 |
| 80 | 10 | 80,000 | 10,000 |
| 800 | 100 | 800,000 | 100,000 |
Remember it this way
- Networks and plans: bits (Mbps)
- Files and storage: bytes (MB, GB)
- Downloads in a window: bytes per second (MB/s)
For more focused converters, try Mbps to MB/s or Kbps to Mbps.
FAQ
Frequently asked questions about the Bits & Bytes Converter
How many bits are in a byte?
Eight.
What is the difference between Mb and MB?
Mb is megabit and MB is megabyte. One MB is eight Mb.
Why do providers use bits?
It is the networking tradition, and it also makes speeds look eight times bigger than the matching byte value.
Is KB/s the same as Kbps?
No. KB/s is kilobytes per second and Kbps is kilobits per second. KB/s is 8 times bigger.
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Use this toolResults are estimates for planning. Last reviewed 2 October 2026.