pourasadm welcome to FlyerTalk and to the QR forum.
Your baggage allowance is based upon industry wide rules and regulations and are very complicated indeed. A brief introduction can be found in the Wiki on
http://www.flyertalk.com/forum/qatar...allowance.html.
Your basic baggage allowance is shown on your E-ticket. To this you can add any bonus weight that you have via status in Oneworld and Privilege Club. There are other possible extra bonus allowances but they are rare and I will ignore them here.
Before a precise answer can be given you need to tell us your flight numbers and cabin class for the flights on your itinerary so we can apply the rules to your ticket. The answer we get should be no different from that on your E-ticket.
If there is more than one airline involved it is important to recognise that allowances differ from airline to airline.
If you exceed that allowance then you will have to pay excess baggage charges. See
http://www.qatarairways.com/dk/en/ex...age-rates.page for details of QRs charges.
This answer is very general because the information you provide is too vague for a more precise answer.
But again what did your ticket state your allowance was?