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Data Transfer: Time | Speed | Size | Start End Time | Compression | Binary Prefixes | Percent | Baud

Calculate Data Transfer Time

Calculate data transfer time for different USB versions and internet connections. Enter the data size and click Calculate. With USB, you have to differentiate between reading and writing, and with an Internet connection, between downloading and uploading. You can specify two values ​​for the transfer speed in order to calculate other theoretical or actual data transfer rates.


Data size:

Transfer via
r
w
USB 1.0
Low Speed
r: 1 Mbit/s
w: 0.75 Mbit/s
USB 1.0
Full Speed
r: 8 Mbit/s
w: 6 Mbit/s
USB 2.0
Hi Speed
r: 310 Mbit/s
w: 240 Mbit/s
USB 3.0
SuperSpeed
r: 2600 Mbit/s
w: 2000 Mbit/s
USB 3.1
SuperSpeed +
r: 5200 Mbit/s
w: 4000 Mbit/s
r = read, w = write
d
u
56k Modem
d: 0.005 Mbit/s
u: 0.003 Mbit/s
ISDN
d: 0.0075 Mbit/s
u: 0.0075 Mbit/s
2x ISDN
d: 0.015 Mbit/s
u: 0.015 Mbit/s
DSL
d: 10 Mbit/s
u: 1 Mbit/s
Fiber-optic
d: 100 Mbit/s
u: 50 Mbit/s
d = download, u = upload
Individual value 1:
Individual value 2:

An example: the write transfer of 1.5 gigabytes would have taken almost four and a half hours with USB 1.0. However, this standard dates back to 1996, at that time the transfer of such data volumes was rather unusual and the storage media were much smaller. With USB 3.0 it takes six seconds, with USB 3.1 only three. If only reading is performed, it is a little faster.

Another example: calling (downloading) a website that contains a few images and thus comes to 500 kilobytes took one minute and twenty seconds with a 56k modem at the end of the 1990s. With DSL the time is theoretically less than a second, in practice more, since the request also has to be processed by the server, which itself takes time.




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The speed inscriptions are average practical values, not the theoretical maximal values. For DSL and optical fiber, there are many more speed rates. With many and small files, the transfer speed can decrease. The conversion factor for the prefixes is 1000, e.g. 1 GB = 1000 MB. If you want to know how fast your internet connection is, search for "internet speed test". The according telecommunications provider can provide an even more precise value upon request by conducting a remote test.


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