Six weeks ago i had a total knee replacement. at this point, to what degree should my knee be bending?

At least 120 degrees: A knee replacement, if done correctly, is designed to bend almost fully-especially at a young age, it is essential to regain full range of motion for a good result and improved lifestyle. Limited bending may come from poor patient effort, technical errors in surgery, trouble with medications, or therapy issues. Often a surgeon will help the knee bend under anesthesia if you can't get it yourself!

Minimum 90 degrees: Every patient will recover at their own pace after total knee replacement. One of the strongest predictors for how well you will be able to regain knee flexion is the degree of flexion you had prior to surgery. Knees that were very stiff prior to surgery will take a significant amount of time and effort to mobilize. Make sure you are aggressive with your range of motion exercises.