Download Time Calculator
Enter a file size and your connection speed. We convert megabits to megabytes for you and add realistic overhead.
Protocol overhead, Wi-Fi and server limits usually cost 5–20%.
Estimated download time–
–Perfect conditions
–Effective MB/s
–Data per hour
Why a "100 Mbps" line does not download 100 MB per second
Internet speeds are sold in megabits per second, while file sizes use megabytes. There are 8 bits in a byte, so 100 Mbps moves at most 12.5 MB each second. On top of that, network protocols, Wi-Fi interference and busy servers shave off some speed, which is what the overhead box accounts for.
Game launchers and some download managers show speed in MB/s, while speed tests show Mbps. If the numbers look eight times apart, that is the reason.