Download Time Calculator
File Size
Size Unit
Internet Speed
Speed Unit
Bandwidth is the maximum rate of data transfer across a network connection, measured in bits per second (bps). Transfer time depends on file size and available bandwidth. Note: file sizes use bytes (B), while bandwidth uses bits (b) — 1 byte = 8 bits.
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Pro Tip
ISPs advertise download speeds, not upload. Upload is typically 10-20% of download on cable. For video conferencing or uploading large files, check your upload speed separately.
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Did You Know?
The first transatlantic telegraph cable in 1858 had a bandwidth of about 0.1 bits per second. Today, a single submarine cable can carry 400 terabits per second — 4 trillion times faster.
References
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