You still have the same amount of pixels – 22,500 – but now it is spread over twice the space. However, if you take a one inch square image that is 150 DPI, and expand it to two inches square, it doesn’t stay at 150 DPI. This image would therefore be 90,000 pixels. Because each side is two inches, not one, but there is the same about of pixels per inch of 150. However, if the image was a two inch square at 150 DPI, the image would be 300px x 300px. It would therefore contain 22,500 pixels.
That figure depends on the image’s dimensions.įor a perfect one inch by one inch square image at 150 DPI, the image would have a 150px x 150px resolution. It’s important to note, however, that this does not define how many pixels (px) the image actually holds. This means that there are 150 dots/pixels for every inch of the image. If you right click on it and select properties, then go to the details tab, you will see plenty of information. So what does DPI mean with respect to an everyday experience? Let’s say you have an image on your computer.
To read the full transcript of the video, click here. We've also created a video explaining the tips mentioned in this guide. The good news is that DPI and PPI are effectively interchangeable. Technically, it should be PPI – pixels-per-inch – and that is an alternative term you will come across more and more. However, the term has carried over to modern digital images.
It literally refers to the number of dots that a printer is printing for every inch of an image. One of the most common is, “what does DPI mean?” Here is a quick explanation.ĭPI stands for dots-per-inch, which is old-school, pre-digital terminology derived from the physical printing process. When working with other indie authors, we’re frequently asked questions about the technical aspects of the book making process. We work every day creating illustrations and designing books. But what does DPI mean?Īt Old Mate Media, we make children’s picture books. If you’re making a children’s picture book or designing a cover, you will hear the term DPI used.