Posted by **Subash** on Friday, May 20, 2011 at 8:12am.

Hi,

i need to calculate download time for file which is 4GB and the speed is 43.2 kbps.

i know i have to divide file size by the speed and to change GB to KB but not sure how to change GB to kbps?

- computer science -
**Reiny**, Friday, May 20, 2011 at 8:47am
Kb means 1000 bytes

MB = 1000 KB

GB = 1000 MB = 1000000Kb

so 4 GB / 43.2 kb/s = 1000000/(43.2 kb/sec)

= 23148.1 seconds

divide by 60 to get into minutes, then by 60 again to get it into hours.

- computer science -
**Marth**, Friday, May 20, 2011 at 10:42am
File sizes are given in bytes, while download speeds are given in bits.

4 GB = 4*1024 MB = 4*1024^2 KB = 4*1024^3 Bytes - 4*1024^3*8 bits.

43.2kbps = 43.2*1000 bits per second.

The time required is 795.364s, or 220.935 hours.

Note that 43.2kbps is quite a low bandwidth.

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