Knee replacement surgery is often the best option for people with chronic knee pain and restricted mobility, which can be caused by arthritis or an injury. Making the choice to have this surgery can change your life, so many people who are thinking about getting it wonder, “How long does knee replacement surgery last?” The answer isn’t just about time on the operating table. Understanding the full picture—including both surgical and recovery timelines—is essential for setting realistic expectations and preparing for a smoother outcome.
The Surgical Timeline: What Happens in the OR
When people ask how long knee replacement surgery takes, they’re often referring to the actual time spent in the operating room. Typically, a total knee replacement takes about 60 to 90 minutes to complete. However, from pre-operative preparation to post-operative monitoring in the recovery room, the total time spent at the surgical facility can range from 2 to 3 hours or more.
If the cartilage and bone on the outside of the knee joint are destroyed, the orthopedic surgeon will remove them during surgery and replace them with metal, plastic, or ceramic devices. Precision is critical, which is why advanced imaging and robotics may be used to ensure the best possible alignment and outcome.
Immediate Post-Surgery Recovery: The First Few Days
After the surgery, patients are taken to a recovery room where vital signs are monitored, and pain is managed. Most individuals will stay in the hospital for 1 to 3 days, depending on their health status and how well they respond to the procedure.
Most of the time, physical rehab starts within 24 hours of surgery. While this may seem fast, early movement helps prevent complications like blood clots and supports a quicker recovery. During this stage, patients learn to use mobility aids like walkers or crutches and perform basic movements safely.
Short-Term Recovery: Weeks 1–6
This is where the recovery time becomes a key consideration. While the surgical procedure may be brief, the recovery period is a more extended journey. During the first six weeks, patients usually go to physical therapy several times a week to focus on increasing their range of motion and lowering their swelling.
Pain, stiffness, and fatigue are common during this time, but most people can resume light daily activities within 4 to 6 weeks. That said, everyone heals at their own pace, and factors such as age, fitness level, and adherence to rehabilitation guidelines will significantly impact progress.
Long-Term Recovery: Months 2–6 and Beyond
By the 8- to 12-week mark, many patients can walk unassisted and begin resuming more regular activities, including driving or returning to work (depending on job demands). However, it can take 3 to 6 months before the knee feels close to “normal” again.
For more active individuals or those involved in physically demanding jobs or sports, full recovery may take up to a year. Strengthening exercises, low-impact aerobic activities like swimming or cycling, and ongoing physiotherapy can all support long-term joint function and durability.
Answering the Big Question
So, how long does knee replacement surgery last? If we’re speaking strictly about the time in the operating room, the answer is usually under two hours. But the broader timeline—from hospital stay to regaining full mobility—spans several months.
Understanding this distinction helps manage expectations and highlights the importance of patience and consistent rehabilitation. While the surgery itself may be over quickly, the investment in recovery is where lasting success truly lies.
Final Thoughts
Knee replacement surgery offers a second chance at pain-free movement and improved quality of life. However, the procedure is just one part of the journey. Knowing the difference between surgical time and recovery time helps patients make informed decisions and prepares them for the commitment required to achieve the best possible outcome.
