Download Time Calculator

Your details

Choose what to solve for. "Find download time" is the standard mode; "Find required speed" tells you what connection you need to finish in a target time.
The total size of the file (or batch of files) you want to download.
Your measured or advertised connection speed. Use a speed test for the most accurate result.
Real-world downloads are slower than ideal because of protocol headers, retransmissions and congestion. Add overhead to get a realistic estimate.
Download timeUnder an hour
5 min 20 sec

Estimated time to complete the download

Time (seconds)320sec
Effective speed100Mbps
File size in GB4GB
320 sec
Instant<5Fast5-60Few minutes60-300Under 1 hour300+

Download will take approximately 5 min 20 sec.

  • The file is 4.00 GB, about 0.9 standard DVD(s) worth of data.
  • Advertised speeds are maximums. Real throughput depends on server capacity, Wi-Fi signal quality, and how many devices share your connection.

Next stepRun a speed test at fast.com or speedtest.net just before downloading to use the actual speed, not the advertised rate.

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