DPI, or dots per inch, is the measure of a computer mouse's sensitivity. The higher your DPI, the farther your on-screen cursor will move for every inch your move the mouse. Your hand size will determine how comfortable a given mouse is to use. Most ultra-light mice will be perfectly usable for the vast majority of hand sizes, but if you have particularly large or small hands then opting for a matching mouse may offer the best results. To find your hand size, keep your fingers together and measure from the tip of your longest finger to your wrist. Mouse Rate Checker records the number of times your mouse sends the data to the computer and measures it in Hz, and because it calculates the polling rate in Hz, that is why it is also called Mouse Hz checker. We all know that gamers like to compare everything: gear, setup, and also settings. But, as we've discussed above, DPI and sensitivity run into problems here, so we just use another measure - eDPI. eDPI, which means effective dots per inch, defines a real mouse sensitivity based on the DPI and the sensitivity. But how do we calculate eDPI? The formula is: