![]() DPI or dots per inch is a similar measurement to PPI, as they both measure density. And that's the reason dot pitch is fading out of the mainstream scene, and why most people don't know what the dot pitch definition is anymore.īefore we move to an example of using the calculator, we must mention DPI. This was the doom of dot pitch and the rise of PPI as the new de facto standard. Now that our devices have a couple of thousand pixels in less than 5 inches, this makes the dot pitch values ridiculously small and hard to understand intuitively. Back in the days when smartphones (and even computer monitors) had resolutions of less than 100 pixels in both the vertical and horizontal direction, the usage of dot pitch was convenient and understandable. The dot pitch is somewhat forgotten, and its value is mostly not used due to the advancements of modern technology. Note that we are using dots and pixels interchangeably, but this might not always be the case. If PPI is a measure of the density of pixels in a given length, dot pitch is the exact opposite: it's the distance between two fixed pixels or dots. This is calculated as the inverse of PPI. The last number that you can find with our calculator is the dot pitch - the distance between two pixels' centers. ![]() This value is found as the product of the vertical and horizontal number of pixels, which is then divided by the total area to give another measure of the pixel density, in this case, how many pixels per square inch. Our pixel density calculator also finds the total number of pixels on the display expressed in megapixels (millions of pixels, symbol: Mpx). Remember that the aspect ratio must be the same for both, that is the size of the screen and its resolution. You can use these values instead of the diagonal size of the screen, and it will internally calculate the length of the diagonal using the Pythagorean theorem. You probably noticed that you can also enter the width and height of the display into the PPI calculator. Where dᵢ is the diagonal screen size in inches. Then, you can calculate the PPI as the ratio between the number of pixels along the diagonal and the diagonal screen size:
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