Keyboard Latency Test

Keyboard Latency Test

Press and hold any key to start the test. The scan rate will be displayed below.

Quick Answer:

The Keyboard Latency Test tool is a software that measures the delay between pressing a key and the corresponding character appearing on the screen. It helps in assessing the responsiveness of keyboards.

Understanding Keyboard Latency

Keyboard latency, also known as input lag, is a crucial part of keyboard performance that often goes unnoticed.

It refers to the delay between the moment a key is pressed and when that input is recognized by the system.

While this delay is typically negligible and unnoticeable in everyday typing tasks, it becomes a significant factor in high-speed, precision-required activities such as gaming.

The Calculation Behind Keyboard Latency

The calculation of keyboard latency involves several steps.

When a key is pressed, there’s a certain amount of time taken for the key to travel down and bounce back.

Once the key bounces back, a signal is generated and transmitted to the computer.

This transmission time is known as the polling rate. After the computer receives the signal, it takes an additional amount of time (system latency) for the character to appear on the screen.

The sum of these times gives us the total keyboard latency.

The Role of Keyboard Latency in Gaming

In the world of gaming, every millisecond counts.

A keyboard with high latency can result in input lag, which can be the difference between victory and defeat in close encounters.

Therefore, serious gamers often seek keyboards with minimal latency to ensure their key presses are registered as quickly as possible.

How to Measure Keyboard Latency

There are several online tools available that can help you measure your keyboard’s latency.

These tools provide real-time statistics as you press keys on your keyboard, recording the response time for each key press and providing an estimated scan rate for your keyboard.

Factors Influencing Keyboard Latency

Several factors can influence your keyboard’s latency, including the scan rate, polling rate, response time, and connection type.

1. Scan Rate

The scan rate of a keyboard refers to the frequency at which the keyboard checks the status of each key.

It is typically measured in hertz (Hz).

2. Polling Rate

The polling rate of a keyboard is the frequency at which the keyboard sends updates to the computer.

It is also measured in hertz (Hz), and a higher polling rate means faster response times.

3. Response Time

The response time of a keyboard is the total time it takes for a key press to be registered by the computer.

It is influenced by both the scan rate and the polling rate.

4. Connection Type

The type of connection used by a keyboard (wired or wireless) can also influence its latency.

Wired keyboards typically have lower latency than wireless keyboards.

Tips for Reducing Keyboard Latency

If you’re experiencing high keyboard latency, there are several strategies you can try to reduce it:

  • Adjust Keyboard Settings: Some keyboards allow you to adjust the polling rate and response time in the settings.
  • Update or Reinstall Drivers: Outdated or corrupt drivers can cause high latency. Make sure your keyboard drivers are up to date.
  • Switch to a Wired Keyboard: If you’re using a wireless keyboard, consider switching to a wired one to reduce latency.
  • Purchase a Low-Latency Keyboard: If all else fails, you might want to consider investing in a keyboard specifically designed for low latency.


Understanding and testing keyboard latency is essential for anyone who relies on their keyboard for precision tasks like gaming or professional typing.

By knowing what affects keyboard latency and how to reduce it, you can ensure your keyboard is always performing at its best.

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