Enter the file dimension (in byte, Kb or Mb) and the transfert rate (in bps or cps) and press TAB to obtain the downloading estimated time: (you have to type in the modem speed) Default Speed Is 28800

 

File Dimension

Tranfer Rate

Estimated Time

 

Connection Bits/Sec Bytes/Sec KB/Min MB/Hour MinSec/MB
Modem 9600 1200 70 4 14m 33s
Modem 14400 1800 106 6 9m 42s
V.34 Modem 28800 3600 211 12 4m 51s
Modem 33600 4200 246 14 4m 09s
V.90 Modem 42000 5250 308 18 3m 19s
V.90 Modem 50000 6250 366 22 2m 48s

KB or Kilobyte = 1024 Bytes, or roughly a thousand

MB or Megabyte = 1024 x1024, or 1048576 Bytes, or roughly a million

Note these numbers are for uncompressed data, just to give you an idea on raw data throughput. With compressible data, throughput can go up by a factor of 2 or 3 over these ratings. However, because graphic images on web pages are already compressed, the real multiplier for web browsing generally works out to around 1.5 to 2x the above listed rates. So divide the times by 2 to approximate real world download times assumming 2 to 1 compression. Faster is better! It is easy to cost justify that $100 for a 56K modem if you value your time. Amazing but true, a large number of web surfers out there still use those tired 14.4 modems.