Converters
Download Speed Converter
Convert download/transfer rates between bit and byte based units.
Free to use — no sign-up or login.
Rates on this page use powers of 1000, and one byte is 8 bits. One hundred megabits per second is 12.5 megabytes per second.
File size in MB or MiB is the megabytes converter. A download speed is not a file size.
Bits and bytes
The byte rows are eight times the matching bit rows. Megabits per second (Mbit/s) use 1,000,000 bit/s. Megabytes per second (MB/s) use 8,000,000 bit/s.
Decimal, not 1024
Network speeds use SI prefixes of 1000. A mebibyte of 1024×1024 bytes is a storage unit, not the unit an ISP prints as Mbps.
Worked example: 100 Mbit/s
From megabits per second to megabytes per second, 100 displays as 12.5. That is 100 million bits per second divided by 8.
\[ 100\,\mathrm{Mbit/s}=12.5\,\mathrm{MB/s} \]
Frequently asked questions
What is 100 Mbit/s in MB/s?
12.5 MB/s.
Why divide by 8?
One byte is 8 bits.
Is Mbps the same as MB/s?
No. Mbps is megabits per second. MB/s is megabytes per second, eight times larger per count.
Does this use 1024?
No. Prefixes here step by 1000.
Can I convert a 5 GB file’s download time?
No. This page converts a rate. It does not divide a file size by that rate.
References
Assumptions and limitations
Decimal SI rates only. Not a download-time estimate and not a binary file-size conversion.