Diagonal Screen Size inches cm. Various approaches can be employed to calculate PPI. The method that is most commonly employed involves calculating the pixels per inch from the diagonal screen size in centimeters or inches and the number of pixels along the horizontal and vertical edges of the display. Step one: Calculate the number of pixels that appear on the diagonal using the following formula:.
You probably noticed that you can also enter the width and height of the display into the PPI calculator. 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. Remember that the aspect ratio must be the same for both, that is the size of the screen and its resolution. Our pixel density calculator also finds the total number of pixels on the display expressed in megapixels millions of pixels, symbol: Mpx.
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. The last number that you can find with our calculator is the dot pitch — the distance between two pixels' centers.
This is calculated as the inverse of PPI. 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. Note that we are using dots and pixels interchangeably, but this might not always be the case. The dot pitch is somewhat forgotten, and its value is mostly not used due to the advancements of modern technology. Back in the days when smartphones and even computer monitors had resolutions of less than pixels in both the vertical and horizontal direction, the usage of dot pitch was convenient and understandable.
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.
This was the doom of dot pitch and the rise of PPI as the new de facto standard. 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. Before we move to an example of using the calculator, we must mention DPI. However, they do it in subtly different ways, or at least they used to. DPI, as we mentioned before, stands for "dots per inch" and it's analogous to PPI in the sense that they both measure how "grainy" an image is.
As the name suggests, dots per inch measures the number of points that exist in the length equivalent to 1 inch on average.
This value is directly related to PPI for modern digital screens since each pixel corresponds to a dot in the image, but it doesn't always have to be a correlation. This is because, in a printer, DPI means the number of ink dots per inch, and it's independent of the resolution of the image we want to print. Let us illustrate it with an example.
Let's assume you have a printer capable of up to dpi when printing. The pixel density of the image at this size is If you're a photographer or designer, or just want to print a great picture without losing quality, use the tool to change its resolution. Login code has been sent to your email.
Didn't receive code? Try again. Choose file. Fast Tool Just select DPI between predefined settings: , , , , , 72, or enter the necessary one, wait a few moments and save. Units Converters. Dot per Meter Smallest. Dot per Meter Base. Dot per Millimeter Biggest. Formula Used.
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