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Online Keyboard Latency Test

When shopping for a keyboard, gamers and heavy typists should consider latency, especially. The delay between when a key is pressed and when the matching character appears on the screen is known as keyboard latency. High latency might make it difficult for users to type quickly and accurately. Keyboard latency may be tested in several ways, including software-based testing that time how long it takes for a key to be pressed before the matching letter appears on screen and hardware-based tests that employ dedicated hardware to perform the same task.

A keyboard latency test may evaluate the responsiveness and quality of a user’s keyboard, and any problems can be pinpointed for further troubleshooting. Keyboard latency studies are becoming increasingly important for both manufacturers and consumers as the need for quicker and more accurate typing grows.

How To Test Keyboard Latency?

Here are the steps you need to take to test the latency of your keyboard.

  • Try out the Keyboard latency test at the top of the page.
  • Press any key on the keyboard to begin the evaluation.
  • The Key Press History section displays the reaction time for each key pressed.
  • On top, you’ll see the fastest average essential press time and the predicted keyboard scan rate.
  • The latency of the keyboard may be evaluated by scrolling through the list of recorded critical response times.

How To Calculate Keyboard Latency?

To determine Keyboard Latency, we measure how long it takes to press a key before the matching letter appears on the screen.

It takes 5ms for a key to debounce after being pushed. After 1 ms (the polling rate), the computer receives the signal created when the key is pressed and released. 

To show up on the screen might take an additional 3–5ms. Considering everything, the following will be the maximum latency for the keyboard. Debounce time + polling rate + system delay = 11 milliseconds.

Features Of Keyboard Latency Test

Various Testing Approaches:

Many different kinds of testing may be run to determine how long it takes for a key to be pressed and the matching character to show on the screen. These include software-based tests and hardware-based tests.


The latency may be measured rather precisely using a keyboard latency test. Users can then fix any keyboard latency issues they may be experiencing.



All users can use keyboard latency testing because it is not brand or model specific.

Analyzing the Outcome:

The results of a keyboard latency test can help users diagnose problems with latency, such as sluggishness or misregistration of keystrokes.

Suggestions for Enhancement:

Users can take action to enhance their keyboard’s performance based on the latency test findings, such as upgrading to a quicker and more accurate model, optimizing computer settings, or switching to a connected connection rather than a wireless one.

What is the Keyboard Scan Rate?

When discussing a computer keyboard, the term “scan rate” relates to how often key presses are detected. This timed test measures how fast the keyboard reports key presses to the central processing unit. The number of Hertz (Hz) used to describe the pace at which a keyboard’s electrical circuits scan the keys. A keyboard that scans its keys at 100 Hz is a good illustration of this.

The scan rate of a keyboard determines how quickly and accurately it responds to your input. An increased scan rate makes for a more responsive keyboard, allowing you to type with more speed and accuracy. In addition, a greater scan rate helps lessen the possibility of “ghosting,” in which the keyboard fails to recognize numerous simultaneous key presses.

The average scan rate for a modern keyboard is between 125 Hz and 1000 Hz, while many high-end gaming keyboards have considerably higher scan rates. However, it should be noted that the scan rate of the keyboard is only one aspect that influences overall typing performance; other factors, such as the key switch type and layout, can also considerably impact typing speed and accuracy.


Keyboard Response Time:

The time it requires for a key press to register and display on the screen is known as the keyboard reaction time. This metric quantifies how rapidly the computer receives and processes input from the keyboard.

It is often expressed in milliseconds (ms). For instance, a keyboard with a 5 ms reaction time would show the pressed key on the screen no more than 5 ms after the key was pushed.

The keyboard’s reaction time significantly determines how quickly and accurately one can type. The more swiftly the computer reacts to key presses, the more responsive and accurate the typing experience will be. 

It’s important to remember that keyboard lag is just one contributor to latency; other variables, like screen refresh rate, CPU speed, and network delay, also play a role.

Response times on modern keyboards are generally between 1 and 10 milliseconds, with significantly faster response times available on gaming keyboards. A reaction time of 5 milliseconds or less is suitable for most users.

Factors Affecting The Keyboard Latency

Keyboard Switches: Some keyboard switches have a greater travel distance or need more force to activate. Because of them, reaction times may be slowed down.

Keyboard Firmware: If the firmware in your keyboard is out of current or has known issues, you may experience input latency when typing.

System software: The keyboard’s response time might be delayed by the OS. Latency issues with the keyboard are frequently mentioned, especially among Windows users. Incorrect configurations and drivers are to blame for this issue.

CPU and RAM: Overusing the central processing unit (CPU) or random access memory (RAM) might slow down the processing and display of keyboard input.

Network Issues: Transmission delays due to latency are possible whenever keystrokes are sent across a network.

Computer’s Peripherals: Keyboard latency can also be affected by other computer hardware. If the mouse uses up too much processing power, for instance, the speed and agility of the keyboard might be negatively affected.

Connection Type: There is less lag when using a wired keyboard as opposed to a wireless one. That’s as opposed to wireless connections, information may be transmitted right through the cable itself.


Importance Of Latency Test

Testing its latency is crucial depending on how the keyboard will be used. It is helpful in many contexts for the following reasons:


Fast-paced video games make the slightest lag in keyboard responsiveness a severe disadvantage. The player’s keyboard has to have minimal latency to have the best possible gaming experience and a competitive edge.



When typing long documents, delays in the keyboard’s responsiveness can be annoying and time-consuming. To reduce the time between when a writer presses a key and when the corresponding character appears on the screen, latency must be kept to a minimum.


In the realm of programming, delays in keyboard responsiveness can make it challenging to execute frequently used keyboard shortcuts fast and precisely. For programmers to be productive, low latency is essential.


Keyboards with low latency are essential for persons with motor skill impairments to use because it ensures that their key presses are registered fast and accurately. This can aid in making computers more user-friendly for those with physical limitations.


Therefore, it is concluded that the adaptability, and accuracy of a keyboard are determined mainly by keyboard latency testing. Users, especially gamers and heavy typists, often find the delays and errors caused by high latency unpleasant. Testing the keyboard’s latency might help users find problems and decide whether they need a new, more responsive keyboard. Keyboard latency studies are becoming increasingly important for both manufacturers and consumers as the need for quicker and more accurate typing grows.

While keyboard latency might be informative, it shouldn’t be the only element you consider when purchasing. Other considerations, such as key switch type, construction quality, and ergonomics, are essential for a pleasant and productive typing time. When it comes to improving speed and accuracy when typing, latency testing is an invaluable resource.


Can I do a latency test on any keyboard or only specific models?

Any keyboard may run a latency test regardless of manufacturer or model. However, outcomes may differ based on the keyboard’s quality and methodology.

How can I do a keyboard latency measurement?

Keyboard latency may be tested using a variety of software and hardware options. Online keyboard latency testing tools and downloadable latency testing software are examples of software-based solutions. 

How much delay between key presses is reasonable?

The delay you can tolerate when gaming or typing is a matter of taste and need. However, for gaming, a latency of less than 10 ms is regarded as suitable, while for typing activities, a latency of less than 20 ms is usually enough.

Is there a way to decrease keyboard lag?

A quicker reaction time keyboard, fine-tuning your computer’s settings, or switching to a cable connection can reduce keyboard latency. However, in some cases, latency problems may be unavoidable owing to hardware constraints or other causes.