New
#11
What do you mean your internet connection is 15 Mbps ? Is that the number obtained on the Speedtest ?
OK here is a simplified explanation of how your internet connection works :
Your PC's Wifi Adapter >> Router >> Internet Provider >> Internet
Barring any Internet slowdown when you do your tests, the slowest will probably be the wifi connection (PC>>Router). It will be the main limiting factor of your global speed. If your Internet plan with your provider is below that (say 15 Mbps like you said), then what is the point of knowing the speed of your wifi connection ? Even with a Wi-Fi at 70 Mbps, it won't matter much since it's higher than what your Internet Provider gives. If you play games for example, what matters most is the latency which is typically worst on wifi than on wired, not the speed rate.
In theory 802.11a and 802.11g offer up to 54 Mbps, and 802.11n offers up to 300 Mbps. In practice, even on 802.11n you rarely approach these rates, and you'll get at best 130-150 Mbps in most cases. 802.11ac promises even more, but even with channel bonding wifi still remains the weak link.
Here is an online calculator : Download Time Calculator
Enter the filesize, then the rate and it will calculate the time it would take to download it.
Last edited by oneeyed; 01 Oct 2014 at 09:33.