I am trying to implement a throughput calculator and i am really confused about all the parameters i have to include. Can someone help me in order to find the exact calculations of the formula?

Are you trying to write a program or you are just using one?
Read first 802.11n data-rates specifications https://en.wikipedia.org/wiki/IEEE_802.11n-2009
That is a maximum that one could get in ideal conditions.

I am trying to write a program. Thanks for the page but i i am trying to find the calculations in order to build my throughput calculator

Hmmm, ok. But what is the purpose of a such program?

Throughput in unlicensed bands (2.4 and 5GHz) is hardly predictable even if you have all the data.
One of main reason for that is variable noise level from other unlicensed radios and that always degrades throughput in real life situations. Different SNR means different modulation rates, CCQ and so on...

So, as a purely programing exercise I can see the point of writing such software but in practical terms that program would give you just an approximation of what throughput might be.

Regards,
M.

I am implementing this program for my dissertation project. I know is not so easy to calculate the throughput but i am trying to have some standard values and some other variables that change also.

You can use this calculator as "sanity check" tool :
http://jaunty-electronics.com/blog/2012 ... alculator/

The whole 802.11n and 802.11ac table is available here http://mcsindex.com/ quite comfortably.

Note that all 802.11 rates are gross data rates.
For 802.11n you need to reduce the gross data rate by two thirds to estimate the net data rate.

The net data rate is half-duplex. (i.e. it is shared between upload and download).

Example:
A modulation of HT-MCS 12 (16 QAM | FEC 2/3 | two Spatial Streams) with 40 MHz and GI=800ns equals a gross data rate of 162 Mbps.
This might result into a net data rate of 108 Mbps half-duplex.
This means you could simultaneously transmit 100Mbps and receive 8 Mbps. Or transmit 54Mbps Fullduplex. This sharing behaviour is dynamic.