Need to know if you are publishing your images on web
Basic Photography
June 9, 2017

What is DPI?

DPI stands for ‘dots per inch'. DPI is a term used for the printed images and the reason being that the printed images are made of the tiny dots. DPI is basically a measurement of the printer solution showing how many ink dots the printer can place in one square inch. DPI is a very important aspect of the images. And it is important to know that higher the DPI, then sharper is the image. For example, if a printer that has 600 DPI can print 600*600 per square inch or 360,000 dots per inch. So, you may now know that it is the output resolution of the imagesetter or the printer. It is the physical dot density of any image when it is reproduced on the printed paper.

 Also, people confuse between both of these terms and they are DPI AND PPI. There is always a misconception that both of these are same. But, there is a fine line of difference between the two.

What is PPI?

PPI stands for the pixels per inch. It is used for the screens because it is a common sense that pixels are only there on the screen. PPI is basically the input resolution of a photograph. Either the pixels per inch or the pixels per centimeter are more or less the measurements of the pixel density or the pixel resolution of a computer monitor, laptop or the phone screen, image scanner, camera or the television display. The computer monitor displays 72 pixels per inch. Also, for example, a 3.8-megapixel image is about 32 inches by 24 inches when it is seen on the monitor.

So, now you got to know about the difference in the DPI and the PPI. They are not same and have a minor difference among them.

You can take two images with the same pixel value for example 1000 pixels wide and after the print, they will be of different sizes depending on the set of DPI. The image at the 72 DPI, will be 13.88 inches wide and at the same image at 300 DPI will be 3.33 inches wide. The image which has a higher DPI looks any day better than the image with the image having lower DPI. It basically means that as many pixels as you can squeeze in a small area there will be a finer detail in the printed image. The DPI does matter a lot after getting the image printed on the paper.


  1. Set your image to the size of your Blog Content width.

If your blog content is of 700 pixels then you can limit your pictures up till the 700 pixels. The images having 750 pixels also will not appear on the screen and it will shrink.

  1. The concept of per inch in a web layout

The concept of PPI and DPI which we discussed above are of no use for editing the pictures in the blog. They may be available in the software but that hardly matters.

  1. The concept of DPI and PPI.

Though PPI and DPI are not so important to the web displays they are important for creating printables. The images which you have to download and print should be created at 300 PPI.


You need to save your JPEG images around 80% image quality. You can compress it to about 20% quality.


You must never scale your photos too small. And then if you want to increase the size and you re-enlarge it then it will make your image blurred and hazy.

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