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How long will a download take?

Type the size and the speed in plain English. The answer is in days, hours and minutes, with what to expect at a real-world 90% of the line.

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    How long will a download take?

    Short answer

    Divide the size by the speed, with both in bits: 100 GB is 800,000 megabits, so at 100 Mbps it takes 8,000 seconds, 2 h 13 min 20 s. Real downloads usually reach about 90% of the line speed.

    Download times at common speeds

    Line speed in megabits per second (Mbps), as providers sell it. Times are at the full speed.

    Size10 Mbps50 Mbps100 Mbps250 Mbps500 Mbps1 Gbps
    1 GB13 min 20 s2 min 40 s1 min 20 s32 s16 s8 s
    10 GB2 h 13 min 20 s26 min 40 s13 min 20 s5 min 20 s2 min 40 s1 min 20 s
    50 GB11 h 6 min 40 s2 h 13 min 20 s1 h 6 min 40 s26 min 40 s13 min 20 s6 min 40 s
    100 GB22 h 13 min 20 s4 h 26 min 40 s2 h 13 min 20 s53 min 20 s26 min 40 s13 min 20 s
    500 GB4 days 15 h 7 min22 h 13 min 20 s11 h 6 min 40 s4 h 26 min 40 s2 h 13 min 20 s1 h 6 min 40 s
    1 TB9 days 6 h 13 min1 day 20 h 27 min22 h 13 min 20 s8 h 53 min 20 s4 h 26 min 40 s2 h 13 min 20 s
    5 TB46 days 7 h 7 min9 days 6 h 13 min4 days 15 h 7 min1 day 20 h 27 min22 h 13 min 20 s11 h 6 min 40 s

    Ways to ask

    Questions

    Line speeds are the raw rate. Protocol overhead, Wi-Fi, the server and other traffic usually leave 80 to 95% of it, so the calculator also shows the time at 90%.

    Mbps is megabits per second, the unit providers sell. MB/s is megabytes per second, the unit file managers and browsers show. A byte is 8 bits, so 100 Mbps is 12.5 MB/s.

    The unit calculator answers any of these, and units, maths, dates and time zones in one box.