Mouse Latency Test Online
Reaction Time Test
Click to start. When the screen turns red, click as fast as you can.
Event Log
Recent mouse events with millisecond precision (last 20)
Click to see events
Play & test — check your mouse performance with games
How to run a mouse latency test
- Click the test area to start. Wait for the screen to turn red.
- Click as fast as possible when the screen turns red. Your reaction time in ms will be displayed.
- Check the event log for millisecond-precision timestamps of each click.
This test measures reaction time plus input latency. Lower values indicate faster response. For a full mouse check, use the main tester.
Mouse Latency Test FAQ
What is a mouse latency test?
A mouse latency test measures the delay between a visual stimulus (e.g., screen change) and your click. It reflects reaction time plus input latency.
What is a good mouse latency?
Reaction times under 250ms are typical. Competitive gamers often achieve 150–200ms. Many factors affect the result, including monitor refresh rate and system performance.
Can I test mouse latency online?
Yes. Our browser-based test measures click reaction time. For hardware-level latency, specialized equipment is needed.
Does this work as a click latency test and input lag test?
Yes. This click latency test measures the delay between your click and the browser registering it, so you can gauge mouse input lag, click delay, and overall response time. For raw polling behaviour, pair it with the Polling Rate Test.
How do I test mouse input lag?
Click into the test area above the moment it prompts you, and the tool records the millisecond gap between the signal and your click. Run it several times and average the results — that average is your mouse input lag. For the cleanest reading, close background apps, plug the mouse into a rear USB port, and set your monitor to its highest refresh rate.
How do I test Bluetooth mouse delay?
Run the same latency test with your Bluetooth mouse, then repeat it with the mouse connected by its 2.4 GHz USB dongle or a cable. Bluetooth almost always shows higher, less consistent latency than a dongle or wire. If the delay bothers you in games, switch to the 2.4 GHz receiver — it is faster and more stable than Bluetooth.
What website tests mouse latency?
This page is a free, browser-based mouse latency test — no download or install required. It measures the click-to-response time in milliseconds and logs your recent events, so you can compare mice, connection types, and USB ports directly in the browser.