How Precise Is Your Drag Control?
Trace a target path with your mouse or finger and measure how accurately you can drag. See your average pixel deviation, smoothness score, and identify pointer drift — all processed locally in your browser.
This test measures the pixel-level deviation between your actual drag path and the target path, calculating average error, maximum deviation, and path smoothness using PointerEvent coordinates.
Professional digital artists maintain sub-2px deviation during controlled strokes, while average users typically deviate 5–15px from a target path.
Round 1/5
What Do Your Results Mean?
| Result | Range | Meaning |
|---|---|---|
| Good | Average deviation under 5px | Your drag precision is excellent. Your pointing device tracks smoothly with minimal drift, suitable for detailed design work and precise interactions. |
| Warning | Average deviation 5–15px | Typical drag accuracy for most users. Minor deviations may come from mouse sensor jitter, touchpad smoothing, or simply the challenge of the path shape. |
| Poor | Average deviation over 15px | Significant pointer drift detected. This could indicate a dirty mouse sensor, an uneven mouse surface, touchscreen calibration issues, or very high pointer acceleration settings. |
Common Issues & Solutions
Mouse cursor jumps or drifts during drag
Clean your mouse sensor lens and ensure you are using a proper mouse pad. Optical sensors struggle on reflective or transparent surfaces. Lower your mouse DPI if the cursor feels too sensitive.
Touch drag is inaccurate or registers offset from finger position
Your touchscreen may need recalibration. On Windows, search for 'Calibrate the screen for pen or touch input' in Settings. Clean the screen surface as dirt or moisture can cause touch offset.