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How long does it take to download a big fat image, or mp3, or zip? This calculator will show the download time for lots of different bandwidth's. You can specify the amount of overhead to be taken into account. A realistic value for normal internet usage (average filesize less than 25KByte) is 50% overhead.

Tip: Save this page on your harddisk to use the calculator off-line.

File Size:
Overhead: %

Speed Time
9.6 Kbps
14.4 Kbps
28.8 Kbps
33.6 Kbps
56 Kbps
64 Kbps (ISDN)
128 Kbps (ISDN-2)
256 Kbps
512 Kbps
1.024 Mbps
1.544 Mbps (DS1, T1)
2.048 Mbps (E1, ISDN-32)
10 Mbps (10Base-T)
25.6 Mbps (ATM25)
34 Mbps (E3)
45 Mbps (DS3, T3)
51 Mbps (OC1)
100 Mbps (100Base-T)
155 Mbps (OC3)
622 Mbps (OC12)
1 Gbps (1000Base-T)
2.4 Gbps (OC48)
10 Gbps (OC192)
KByte = Kilobyte
MByte = Megabyte
GByte = Gigabyte
Kbps = Kilobit per second
Mbps = Megabit per second
Gbps = Gigabit per second