What Is Polling Rate? Mouse & Keyboard Explained

Polling rate meaning

Polling rate (or report rate) is the frequency at which a mouse or keyboard sends its current state — position, button presses, key states — to the host computer. The unit is hertz (Hz), or reports per second. A 1000 Hz mouse sends 1000 position updates per second, or one every millisecond. A 125 Hz mouse sends one every 8 milliseconds.

The host operating system requests these reports on a schedule. The device does not push data continuously; it responds to the host's poll. The polling rate setting in vendor software tells the device how often to expect that poll. Higher rates mean the cursor or key state is updated more frequently, which can reduce the time between your physical input and the on-screen result.

Standard rate classes

The table above lists the common classes. Most gaming mice default to 1000 Hz. Some newer models offer 2000, 4000, or 8000 Hz. Office mice often sit at 125 Hz. The interval column shows the time between reports — the theoretical minimum latency contribution from the polling interval alone.

Is higher polling rate better?

Higher polling rate reduces the polling interval, which can shave fractions of a millisecond off input latency. For competitive players, 1000 Hz over 500 Hz is perceptible in fast flick shots. Beyond 1000 Hz, the gains shrink. Most people cannot feel the difference between 1000 Hz and 2000 Hz in normal play. The browser-observed rate for 4000 Hz and 8000 Hz mice is almost always lower than the setting because the OS and display pipeline cannot deliver that many distinct timestamps per second.

Higher rates also cost more CPU cycles and, on wireless mice, more battery. The CPU cost is small on modern systems but measurable on older hardware. Wireless battery life can drop noticeably at 4000 Hz or 8000 Hz compared to 1000 Hz. If you use a wireless mouse and value battery life, 1000 Hz is often the sweet spot.

Polling rate vs DPI — they are not the same

DPI (dots per inch) or CPI (counts per inch) measures how many counts the sensor registers per physical inch of movement. Polling rate measures how often those counts are sent to the computer. You can have a high-DPI, low-polling-rate mouse (cursor moves far but updates rarely) or a low-DPI, high-polling-rate mouse (cursor moves little but updates often). Both affect feel, but they control different things. Sensitivity in games is usually DPI multiplied by in-game sensitivity; polling rate does not change that product.

Keyboard polling rate — what a browser cannot measure

Keyboards also have a polling rate, typically 1000 Hz on gaming models. However, a browser cannot measure it. Key events (keydown, keyup) arrive after the operating system processes them, and the WebHID API does not expose keyboard input to web pages. The browser receives key events at whatever rate the OS delivers them, which is not the same as the keyboard's hardware polling rate.

We explain this limitation in detail in our keyboard guide. Browsers receive key events after OS filtering and cannot read raw USB packet timestamps. WebHID blocks keyboards for privacy reasons. For an in-depth breakdown of ghosting, rollover limits, and why keyboard Hz is unmeasurable online, read our guide on what browser keyboard testing can and cannot show.

Does polling rate affect FPS?

Polling rate does not directly affect frames per second rendered by the GPU. It affects how often the cursor position or key state is sampled per frame. On a high-refresh display (144 Hz, 240 Hz), a higher polling rate provides more samples per frame, which can make motion look smoother and reduce micro-stutter. The effect is indirect and small compared to GPU and CPU load from the game itself.

What rate should you use?

For most competitive gaming, 1000 Hz is the standard. It is widely supported, stable, and the browser can observe it reliably. If your mouse offers 2000 Hz and you want to try it, test for stability — some sensors or wireless links wobble at the higher setting. For wireless mice where battery matters, 1000 Hz or even 500 Hz is often the practical choice. Office work needs no more than 125 Hz or 250 Hz. The browser guide has troubleshooting steps if your observed rate is unstable or far below the setting.

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