Explains the distinction between decimal prefixes such as MB and binary prefixes such as MiB.
Unit conversion
MB/s to Mbps Converter (Megabytes to Megabits per Second)
1 MB/s = 8 Mb/s. Enter a value to convert MB/s to Mb/s, then use the formula and table below. Displayed digits may be rounded.
Data-transfer speedInstant result
Decimals
Formula result = input × 8000000 ÷ 1000000. 1 MB/s = 8 Mb/s
Nonzero results too small for the selected decimal places use scientific notation.
Nonzero results too small for the selected decimal places use scientific notation.
Common examples
One value, several units
Bits per second8,000,000 bit/s
Kilobits per second8,000 kb/s
Megabits per second8 Mb/s
Gigabits per second0.008 Gb/s
Kilobytes per second1,000 kB/s
Conversion table
| MB/s | Mb/s |
|---|---|
| 1 MB/s | 8 Mb/s |
| 2 MB/s | 16 Mb/s |
| 5 MB/s | 40 Mb/s |
| 10 MB/s | 80 Mb/s |
| 25 MB/s | 200 Mb/s |
| 50 MB/s | 400 Mb/s |
| 100 MB/s | 800 Mb/s |
Conversion chart
1 MB/s8 Mb/s
5 MB/s40 Mb/s
10 MB/s80 Mb/s
25 MB/s200 Mb/s
50 MB/s400 Mb/s
Worked example
1 MB/s = 8 Mb/s. Apply the selected conversion formula to other input values.
Unit definition
Megabytes per second (MB/s) One megabytes per second equals 8,000,000 bit per second.
Unit history
Megabytes per second is represented here using its modern SI definition or an internationally accepted relationship to an SI base unit.
Step by step
1. Parse the value, including fractions.
2. Convert MB/s to bit per second.
3. Convert the base value to Mb/s and apply your display precision.
Understand the result before using it
MB/s means megabytes per second, while Mbps (also written Mb/s) means megabits per second. One byte contains eight bits, so multiply MB/s by 8 to obtain Mbps. Both units here use the decimal mega prefix, meaning one million. Uppercase B means bytes; lowercase b means bits.
Calculated result
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.
Formula, assumptions, and example
Formula
result = input × 8
Assumptions
- Megabytes per second and Megabits per second represent the same data-transfer speed quantity.
- The input is expressed in MB/s; the output is expressed in Mb/s.
- The unit definitions and conventional relationship shown on this page apply.
Worked example
A transfer rate of 40 MB/s equals 40 × 8 = 320 Mbps. At 80 MB/s, calculate 80 × 8 = 640 Mbps. To reverse the conversion, 100 Mbps ÷ 8 = 12.5 MB/s before protocol overhead and other limits.
When to use it
Good uses
- Compare a download rate reported in MB/s with an internet connection advertised in Mbps.
- Express a decimal file-transfer rate in the bit-per-second units used by a network specification.
Limitations
Common mistakes to avoid
- Check capitalization: 40 MB/s is 320 Mbps, but 40 Mb/s already means 40 Mbps.
- MiB/s uses a binary multiplier and is a different unit from MB/s. This page converts decimal MB/s.
- A unit conversion does not predict actual download speed. Protocol overhead, server limits, Wi-Fi conditions and storage performance can reduce the rate you observe.
Sources and further reading
These references explain the underlying standards or provide authoritative context. Your own contract, institution, clinician, product documentation, local code, or governing standard may be the controlling source.
Guidance on unit names, symbols, conversions, and numerical presentation.
Questions about this calculation
What is 40 MB/s in Mbps?
40 MB/s × 8 = 320 Mbps. This assumes uppercase B denotes bytes and both units use decimal prefixes.
What is 80 MB/s in Mbps?
80 MB/s × 8 = 640 Mbps.
Are MB/s and Mbps the same?
No. MB/s counts megabytes per second and Mbps counts megabits per second. One byte is eight bits, so 1 MB/s equals 8 Mbps.
Does a 100 Mbps connection download at 100 MB/s?
No. 100 Mbps ÷ 8 = 12.5 MB/s before overhead and other limits. The actual observed rate may be lower.