Input Lag Test
A free tool for measuring system input lag with millisecond accuracy. Breaks down the total delay into event processing, render latency, and estimated display lag. Click 20 times to get a detailed analysis of your setup performance.
Analyze click-to-pixel delay and optimize your setup for gaming
Features
How to Measure Input Lag
Choose your monitor panel type (IPS, VA, TN, OLED] from the dropdown so the tool can estimate hardware display latency.
Click anywhere in the large test zone. Each click measures event processing lag and render delay. You need 20 clicks for reliable results.
After 20 clicks, see your average total lag, breakdown by component, distribution histogram, and performance rating from Excellent to Poor.
FAQ
What is input lag?
Input lag is the total delay from when you physically click the mouse to when a visual change appears on screen. It includes OS event processing, browser JavaScript execution, GPU rendering, and display panel response time.
What is a good input lag result?
Under 10ms total is excellent for competitive gaming. 10-20ms is good for most games. 20-30ms is average and fine for casual use. Over 30ms may be noticeable in fast-paced games and could benefit from optimization.
Why does my input lag vary between clicks?
Variation (jitter] is normal and caused by OS task scheduling, browser garbage collection, background processes, and GPU load. Lower jitter means more consistent performance. Close unnecessary tabs and applications to reduce it.
Does this test measure actual hardware latency?
This tool measures software-level latency (event processing and render delay] with high accuracy. Hardware display latency is estimated based on your selected panel type. For total end-to-end measurement, specialized hardware like a 1000fps camera is needed.
How can I reduce my input lag?
Use a high refresh rate monitor (144Hz+], enable game mode on your display, use a wired mouse with high polling rate (1000Hz+], close background applications, disable V-Sync, and keep your GPU drivers updated.
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