Calculate optimal time to transfer files depending on connection<
Kris Stewart ECCSE; stewart@sdsu.edu
Professor Emerita, Computer Science, since June 2013

this url stewart.sdsu.edu/eccse/Calc_TransTimes/ Upd 06Jan2026 recovering ECCSE web page.
The Ed Center on Computational Science and Enginerring (ECCSE) was an NSF partnership activity with the San Diego Supercomputer Center from 1997-2004, called NPACI. As the director of this enterprise, I did not want to loose our Web Page, while the SDSU campus began imposing additional and very appropriate requirements. For example, empty links had to be fixed.

Enter the size of your hard drive and see the resulting transfer time

Enter file size:
Modem 14.4 Kbps (Kilobits per second) hours minutes seconds
Modem 28.8 Kbps (Kilobits per second) hours minutes seconds
Modem 33.6 Kbps (Kilobits per second) hours minutes seconds
Modem 56.6 Kbps (Kilobits per second) hours minutes seconds
64Kbps ISDN (Integrated Services Digital Network) hours minutes seconds
128Kbps ISDN (Integrated Services Digital Network) hours minutes seconds
T1 1.544 Mbps (Megabits per second) hours minutes seconds
T3 45 Mbps (Megabits per second) hours minutes seconds
OC1 52 Mbps (Megabits per second) hours minutes seconds
OC3 155 Mbps (Megabits per second) hours minutes seconds
OC12 622 Mbps (Megabits per second) hours minutes seconds
For Your Information: Megabit: About one million bits. Exactly 1,048,576 bits (2^20).
Kilobit: About one thousand bits. Exactly 1024 bits (2^10).
Bit: Smallest unit of data in a computer. A bit has a single binary value, 0 or 1.

Written by Jerry Kuzminsky.