Dimensions describe a grid
An image that is 1200 by 800 pixels contains a rectangular grid with an aspect ratio of 3:2. The ratio describes shape; the pixel dimensions describe how many samples are available across each direction.
When width and height are changed by different proportions, the image can look stretched or squashed. Keeping the same ratio preserves its shape, while cropping changes which part of the image is visible.
Pixel count is not print size by itself
How large an image appears in print also depends on the output resolution and physical dimensions chosen by the publishing software. A pixel count alone does not determine a universal physical size.
Before exporting, decide whether the destination needs a particular shape, minimum dimensions, or file size. The image resizing utility lets you set output pixel dimensions and review the result. Enter proportional dimensions when preserving shape is important.
Written by
Tufail AhmedComputer Scientist
Tufail builds CalcPool's calculators and writes the research behind them, turning documented formulas and primary sources into tools and explainers you can actually use.
Reviewed by Khizar Nadim · Technical Reviewer