Patellofemoral Stress from Quadriceps Q-Angle Calculator

Calculate patellofemoral joint stress from quadriceps force and Q-angle. Normal Q-angle: 10-15 deg males, 15-20 deg females. Higher Q-angle increases lateral patellar compression

Each component has a specific meaning:

• Quadriceps force — The quadriceps force recorded for the scenario being assessed.
• Q-angle — The q-angle recorded for the scenario being assessed.

Note: Interpret the patellofemoral stress result against the thresholds and context described above.

Enter the quadriceps force, Q-angle for the scenario you are assessing. Calculate patellofemoral joint stress from quadriceps force and Q-angle. Normal Q-angle: 10-15 deg males, 15-20 deg females. Higher Q-angle increases lateral patellar compression. Use the patellofemoral stress result to inform your calculation.