6XC

Download Time Calculator

How long a file takes to download at your connection speed — with the Mbps vs MB/s trap handled correctly.

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The 8× Trap

Internet plans are sold in megabits per second (Mbps); file sizes are measured in megabytes (MB) — and 8 bits make a byte. A "100 Mbps" line moves at most 12.5 MB/s, so a 60 GB game needs ~80 minutes at full speed, not 10. This calculator takes size in MB/GB and speed in either unit and does the conversion for you.

Real throughput runs 5-15% under the headline rate (protocol overhead, Wi-Fi loss, server limits) — the result here is the theoretical floor. If downloads are far slower, test the connection with a speed test and try a wired link: Wi-Fi in a far room can quietly cut speed in half.

Frequently Asked Questions

Why does my 100 Mbps plan download at "only" 12 MB/s?

That IS 100 Mbps — divide by 8. Browsers display MB/s, providers advertise Mbps; both are right, just different units.

Does upload speed affect downloads?

Slightly: acknowledgments travel upstream, so a saturated upload (cloud backup running) can throttle downloads noticeably on asymmetric lines.

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