Floor determination is one of the challenges in indoor positioning research. To date indoor positioning solutions for floor determination have been mainly based on either Fingerprinting  or RF-ID . While these solutions have been able to locate persons or equipments accurately even in multi story buildings, these can not be considered as time and cost efficient solutions. Therefore, in this research we present new Wi-Fi based indoor positioning algorithms in order to accommodate the need for limited resources solution in terms of deployment time and cost. While finger-printing and RF-ID based solutions have been targeting sub-meter position accuracy, this research focuses on floor determination only. In addition, in this research we have highlighted two possible approaches by using available Wi-Fi signals for floor determination.