Download Time Calculator
Estimate how long a file may take to download from its size and your connection speed. The result updates as you type.
Common file sizes
Common internet speeds
Estimated download time
1 minute 20 seconds
Actual download times can be longer because of server limits, network congestion, Wi-Fi conditions, and protocol overhead.
If real downloads are much slower than this estimate, compare with slow internet on a Windows PC before changing router settings.
How this tool works
Time is file size in bits divided by advertised speed in bits per second. There are 8 bits in a byte, so 100 Mbps is about 12.5 MB per second before overhead, not 100 MB per second.
The math runs in your browser. We do not measure your live bandwidth.
Important limitations
This is not a speed test. Enter the speed you think you have, or a number from your ISP plan. Evening congestion and a slow website will not show up here.
Frequently asked questions
Why is my real download slower?
Plans are advertised in megabits (Mb), while file sizes are in megabytes (MB). Overhead, Wi-Fi, and the server you download from all reduce throughput. This calculator uses decimal units (1 Mbps = 1,000,000 bits per second).