Abstract: Disclosed embodiments pertain to systems to intraoperatively determine prosthetics (such as femoral stems) or a combination of prosthetics (such as a femoral stem used in combination with other prosthetics) that meet target parameters (such as leg length). The system may determine, for a patient, a plurality of leg lengths, where each leg length may correspond to a distinct digital prosthetic template in a set of digital prosthetic templates, and where each digital prosthetic template may be associated with a distinct prosthetic in a set of prosthetics. In response to a received target leg length for the patient, the system or method may determine prosthetics that when implanted in the patient would yield the target leg length and may display corresponding prosthetic information. The target length may be input using slider on a graphical user interface and the system may interactively update the prosthetics that would yield the target leg length.