How to Calculate Image Resolution

By Society & Culture & Entertainment Last updated Sunday, May/19/2024

1). Open your image in your photo editor.
2). Check the total height of the image in pixels.
3). Check the total height of the image in inches.
4). Divide the total number of pixels for the height by the height of the image in inches. For instance, if the image is 1,000 pixels high and 10 inches high, you get 100. This means the image is 100 ppi, which will translate to 100 dpi when you print it, a fairly low resolution photo.
5). Increase the sharpness of the image by making the total size (or output size) smaller while keeping the number of pixels the same. If you print the same 1,000 pixel high photo at 3 inches instead of 10 inches high, you get a photo with 333 dpi, a very high quality resolution.