File transfer speed calculator

Use our File Transfer Speed Calculator to estimate file transfer rates when uploading or downloading files.

Notes:

As of 4/17/2009, Vision Graphics' network connection is a 5-megabit fiber-optic link. Depending on your own connection speed, your transfer rate may be anything up to 5-megabit/sec.
Calculated times represent best-case transfer times. Network conditions and other factors beyond our control may negatively affect your actual transfer speed.

[Portions of the code for this page are borrowed from a similar calculator
by Jim Martindale at http://www.martindalecenter.com.]

BASIC DEFINITIONS bps = bits per second. There are 8 bits in a byte, so bps/8 = bytes/sec. Kbps = kilobits per second. Kilo mean a thousand, but in computerese, it usually means 1024, which is 2 raised to the 10th power (2¹⁰). Kbytes/sec = kilobytes per second. This is the same as Kbps divided by 8. Mbps = megabits per second, or a million bits per second. Mbytes/sec = megabytes per second, the same as Mbps divided by 8. Gbps = gigabits per second, or a billion bits per second. Gbytes/sec = gigabytes per second, the same as Gbps divided by 8. DS-0 = Digital Signal Level 0. This is a phone line configured to carry digital data at a rate of 64K bps. T1 = Trunk line. Also called a DS-1. A T1 is a Telco-standard bundle of 24 DS-0's. Channel = Each phone line in a T1. Also called a voice circuit. Fractional T1 = a T1 with less than 24 channels activated.

Enter File Size
Enter a file size and click Kbytes or Mbytes:

Vision Graphics: 5-megabit Fiber Optic Link
5 mbit fiber	5.120 Mbps or 640Kbytes/sec	hr	min	sec

Standard Modem Speeds
9600 bps modem	9600 bps or 1200 bytes/sec	hr	min	sec
14.4K modem	14,400 bps or 1800 bytes/sec	hr	min	sec
19.2K modem	19,200 bps or 2400 bytes/sec	hr	min	sec
28.8K modem	28,800 bps or 3600 bytes/sec	hr	min	sec
33.6K modem	33,600 bps or 4200 bytes/sec	hr	min	sec
56K modem	57,600 bps or 7200 bytes/sec	hr	min	sec

High-Speed Copper: ISDN, DSL, Digital Signal, Trunk
64K ISDN, DS-0	Digital Signal Level 0 – 1 channel (1/24 of T1) 64 Kbps or 8 Kbytes/sec	hr	min	sec
128K ISDN/DSL	128 Kbps or 16 Kbytes/sec	hr	min	sec
256K DSL	256 Kbps or 32 Kbytes/sec	hr	min	sec
512K DSL	512 Kbps or 64 Kbytes/sec	hr	min	sec
640K DSL	640 Kbps or 81.9 Kbytes/sec	hr	min	sec
1M DSL	1 Mbps or 128 Kbytes/sec	hr	min	sec
1.5M DSL, Cable Modem DS-1, T1	Digital Signal Level 1 – 24 channels (1xT1) 1.544 Mbps or 192 Kbytes/sec	hr	min	sec
DS-2, T2	Digital Signal Level 2 – 96 channels (4xT1) 6.312 Mbps or 768 Kbytes/sec	hr	min	sec
DS-3, T3	Digital Signal Level 3 – 672 channels (28xT1) 44.736 Mbps or 5,592 Kbytes/sec	hr	min	sec
DS-4, T4	Digital Signal Level 4 – 4032 channels (168xT1) 274.176 Mbps or 34,272 Kbytes/sec	hr	min	sec

Fiber Optic: Optical Carrier
OC-1c	Optical Carrier Level 1 – 672 voice circuits (1 DS-3) 51.840 Mbps or 6,480 Kbytes/sec	hr	min	sec
OC-3c	Optical Carrier Level 3 – 2,016 voice circuits (3 DS-3) 155.520 Mbps or 19,440 Kbytes/sec	hr	min	sec
OC-9c	Optical Carrier Level 9 – 6,048 voice circuits (9 DS-3) 466.560 Mbps or 58,320 Kbytes/sec	hr	min	sec
OC-12c	Optical Carrier Level 12 – 8,064 voice circuits (12 DS-3) 622.080 Mbps (77,760 Kbytes/sec)	hr	min	sec
OC-18c	Optical Carrier Level 18 – 12,096 voice circuits (18 DS-3) 933.120 Mbps or 116,640 Kbytes/sec	hr	min	sec
OC-24c	Optical Carrier Level 24 – 16,128 voice circuits (24 DS-3) 1.244 Gbps or 1244.16 Mbps	hr	min	sec
OC-36c	Optical Carrier Level 36 – 24,192 voice circuits (36 DS-3) 1.866 Gbps or 1866.24 Mbps	hr	min	sec

Fiber Optic: Optical Carrier, Fiberless Optic/Laser
OC-48c	Optical Carrier Level 48 – 32,256 voice circuits (48 DS-3) 2.488 Gbps or 2488.32 Mbps	hr	min	sec
OC-192c	Optical Carrier Level 192 – 129,024 voice circuits (192 DS-3) 9.953 Gbps or 9953.28 Mbps	hr	min	sec
OC-768	Optical Carrier Level 768 – 516,096 voice circuits (768 DS-3) 39.813 Gbps or ~40000 Mbps	hr	min	sec
OC-3072	Optical Carrier Level 3072 – 2,064,384 voice circuits (3072 DS-3) 159.252 Gbps or 160000 Mbps (20,000,000,000 bytes per second)	hr	min	sec

Terabit Optical Networks: Dense Wave Division Multiplexing (DWDM)
DWDM - 10.9 Tbps	Dense Wave Division Multiplexing – multiple data signals carried on different wavelengths of light (10.900 Tbps or 10900000 Mbps)	hr	min	sec