Mouse Speed & Acceleration Test

Welcome to the Mouse Speed & Acceleration Test, a precision diagnostic tool engineered to determine whether your operating system is silently applying mouse acceleration to your input. Mouse acceleration, known in Windows as 'Enhance pointer precision', is a non-linear transformation applied to raw sensor data that causes your cursor to move faster when you flick the mouse quickly and slower when you move it gently. While this may seem helpful for casual desktop navigation, it is universally considered detrimental to competitive gaming, professional graphic design, and any task where consistent, predictable cursor movement is essential.

The fundamental problem with mouse acceleration is the destruction of muscle memory. In competitive first-person shooter (FPS) games like Counter-Strike 2, Valorant, and Apex Legends, players spend thousands of hours training their neuromuscular system to associate specific arm movements with specific crosshair displacements. Mouse acceleration breaks this relationship entirely. A slow 3-inch swipe might move the crosshair 90 degrees, while a fast 3-inch swipe might move it 180 degrees. This inconsistency makes it physiologically impossible to develop the precise, repeatable aim that professional-level play demands.

Our Mouse Speed & Acceleration Test uses a scientifically rigorous two-phase methodology to detect acceleration. In Phase 1, you are instructed to move your mouse at a slow, deliberate pace inside the testing area. The tool captures hundreds of movement samples using the browser's MouseEvent.movementX and movementY properties, calculating your average cursor velocity in pixels per second at low physical hand speed. In Phase 2, you are instructed to move the mouse as rapidly as possible. The tool captures the same data at high physical hand speed. By comparing the ratio of average speeds between the two phases, the algorithm determines whether acceleration is present.

In a perfectly linear (acceleration-free) system, the ratio between fast and slow cursor speeds should be directly proportional to the ratio of your physical hand speeds. If you move your hand twice as fast, the cursor should move exactly twice as fast — no more, no less. When acceleration is active, the cursor moves disproportionately faster during quick movements. Our algorithm flags a ratio above 2.5x as 'mild acceleration' and above 4x as 'strong acceleration'. These thresholds are calibrated against known acceleration curves from Windows, macOS, and common mouse driver software.

The test also generates a real-time speed graph that visualizes your cursor velocity over the entire testing session. This graph is invaluable for diagnosing not just the presence of acceleration, but its characteristics. A linear (non-accelerated) system will show two distinct plateaus — one for slow movement and one for fast movement — with clean transitions between them. An accelerated system will show a non-linear curve where speed ramps up disproportionately, and may exhibit 'spikes' where the OS acceleration curve amplifies sudden movements.

For Windows users, the most common culprit is the 'Enhance pointer precision' setting. This is a system-level checkbox located in Settings → Bluetooth & Devices → Mouse → Additional Mouse Settings → Pointer Options. Unchecking this box immediately switches the OS to raw, 1:1 input processing. However, this is not the only source of acceleration. Individual mouse drivers (Logitech G HUB, Razer Synapse, SteelSeries GG) may include their own acceleration, smoothing, or angle-snapping features that operate independently of Windows. You must check your mouse software and disable any 'acceleration', 'prediction', or 'smoothing' options.

macOS users face a more challenging situation. Apple has deeply embedded an aggressive acceleration curve into the operating system's input pipeline. The 'Tracking speed' slider in System Preferences adjusts the magnitude of this curve but never fully eliminates it. To achieve true raw, linear input on macOS, you must install a third-party tool such as LinearMouse, SteerMouse, or CursorSense. These utilities intercept mouse events at a low level and apply a flat acceleration profile, overriding the system curve. This is essential for any competitive gamer using macOS.

After using our tool to confirm that acceleration has been successfully disabled, we recommend combining this data with our Mouse DPI Test (to verify your sensor's actual output) and our Mouse Polling Rate Test (to ensure your USB communication speed is optimal). Together, these three tools provide a complete diagnostic picture of your mouse's input pipeline. A properly configured gaming mouse should output raw, unmodified sensor data at a high polling rate (1000Hz), with no acceleration, no angle snapping, and no smoothing applied at any level of the software stack.