Convert internet speed from Mbps (megabits per second) to MB/s (megabytes per second) using our free online calculator. Enter your speed or select a common value to find its equivalent data transfer rate instantly.
This calculator is useful when comparing an internet package’s advertised speed with the download speed displayed by a browser, download manager or other application.
Enter an internet speed in megabits per second (Mbps) to see its equivalent in megabytes per second (MB/s). The result updates instantly. No speed test or network request is performed.
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Enter a positive number or zero, using a dot for decimals.
Example speeds
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How to convert Mbps to MB/s
Divide the speed in Mbps by eight. An uppercase B means bytes, while a lowercase b means bits. One byte contains eight bits.
For example, a connection advertised at 80 Mbps has a theoretical rate of 10 MB/s (80 ÷ 8). This does not mean every file will download at exactly 10 MB/s.
Mbps to MB/s conversion chart
| Internet speed (Mbps) | Equivalent (MB/s) |
|---|---|
| 1 Mbps | 0.125 MB/s |
| 5 Mbps | 0.625 MB/s |
| 10 Mbps | 1.25 MB/s |
| 20 Mbps | 2.5 MB/s |
| 30 Mbps | 3.75 MB/s |
| 50 Mbps | 6.25 MB/s |
| 100 Mbps | 12.5 MB/s |
| 200 Mbps | 25 MB/s |
| 500 Mbps | 62.5 MB/s |
| 1000 Mbps | 125 MB/s |
Why might an actual download be slower?
Internet providers typically describe connection rates in Mbps, while download managers may display MB/s or MiB/s. Even after converting the units correctly, real transfers can be affected by Wi-Fi quality, congestion, server capacity, device performance, and protocol overhead. A converter does not measure any of these factors.
What is the difference between MB/s and MiB/s?
MB/s uses decimal megabytes: 1 MB is 1,000,000 bytes. MiB/s uses binary mebibytes: 1 MiB is 1,048,576 bytes. The main result shows MB/s; the smaller result shows MiB/s so you can compare software that displays different units.
Unit reference: NIST definitions of bytes, MB and MiB.
Understand Your Internet Speed in Real-World Downloads
Internet service providers in Pakistan, including PTCL and other broadband operators, commonly express internet speeds in Mbps. However, some applications display download progress in MB/s or MiB/s.
These figures represent different units, even when they describe the same data transfer.
For example, a 100 Mbps internet connection has a theoretical maximum transfer rate of 12.5 MB/s. This does not mean every download will reach that rate. The available bandwidth may be shared between devices, and individual downloads can be limited by the server, Wi-Fi connection or network conditions.
How to Compare Your Internet Package with Download Speed
Suppose your broadband connection is advertised at 40 Mbps, but your download manager displays 4 MB/s.
Converting 40 Mbps gives 5 MB/s, the theoretical maximum rate in decimal megabytes per second. Your observed 4 MB/s is equivalent to 32 Mbps.
This comparison helps you understand the figures, although it cannot identify why your download is slower.
For a meaningful comparison, check that both values refer to the same units and consider whether other devices are using the connection.
Estimating Download Time from Mbps
Once you know the equivalent speed in MB/s, you can make a basic estimate of how long a file might take to download.
For example, consider a 500 MB file on a 40 Mbps connection:
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Internet speed: 40 Mbps
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Equivalent transfer rate: 5 MB/s
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File size: 500 MB
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Ideal download time: 500 ÷ 5 = 100 seconds
That is approximately 1 minute and 40 seconds under ideal conditions with a sustained transfer rate. Actual download times can be longer.
This example uses decimal megabytes, with 1 MB equal to 1,000,000 bytes.
What This Converter Can and Cannot Tell You
The calculator converts speed units mathematically. It does not connect to an ISP test server, measure your Wi-Fi signal or determine the performance of your current internet connection.
You can use it to understand advertised speeds, interpret download figures and compare theoretical transfer rates. To diagnose a slow connection, you need actual speed measurements taken under comparable conditions.
The conversion applies equally to PTCL, fiber broadband, cable internet and mobile data connections because the relationship between bits and bytes does not depend on the provider.