What is the difference between image size and resolution?

Although the two terms are very much similar, yet they are not quite the same.

Image size implies to the number of total pixels in an image. Image size is obtained by multiplying the number of pixels in the breadth to the number of pixels in the length of an image, in the same way as one would calculate the area of a rectangular figure.

The resolution, on the other hand, refers to the amount of quality or detail in the image which is calculated by measuring the total number of dots of information per square inch of the image. Hence the unit of resolution is DPI or dots per inch. By just knowing the resolution of an image, you can’t figure out how large an image is.

One of the interesting facts is that the print resolution is far greater as compared to the screen resolution. Typically a computer has a resolution of 72 DPI, and therefore, all images used on the internet should have a resolution of 72 DPI. On the other hand, print resolution can range from 300 to 1000 DPI.

An online image compressor like our JPEG Compressor takes care of the resolution while reducing the image size. Images of high resolution take longer to download, hence image compressor could be used to compress image online. For this very reason, large sized JPEG, JPG, or PNG files can be compressed using our JPEG Compressor to improve the online display and load speed.

Use this free JPEG compression software here today!