Bandwidth Calculator

How long does it take to download a file at different connection speeds?

Instructions: Our calculator measures the estimated time needed to download a file at different connection speeds. Simply type in the file size in the field below and choose a measurement unit. The fields below will automatically populate with estimated download times *based on connection speed.
KB(Kilobytes)
MB (Megabytes)
GB (Gigabytes)
TB (Terabytes)
Connection
Capacity
Time
33.6 K (Modem)
33,600 bps
56 K (Modem)
56,000 bps
64 K (DS-0)
64,000 bps
128 K (ISDN)
128,000 bps
256 K (DSL)
256,000 bps
640 K (DSL/Cable)
640,000 bps
768 K (DSL/Cable)
768,000 bps
T1, DS-1
1.544 Mbps
T3, DS-3
44.736 Mbps
OC-1
51.840 Mbps
OC-3
155.520 Mbps
OC-12
622.520 Mbps
OC-48
2.488 Gbps
OC-192
10Gbps

*Note: these calculations assume a "perfect" connection at the stated speed. Actual performance will vary due to retries, latency, transmission protocol requirements, and other concurrent traffic.
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