Banner Aspect Ratio Calculator

How to use this tool

Choose an image or enter the requested dimensions, adjust the available settings, review the result, and export when the output looks correct.

What happens to image quality?

Raster images contain a fixed pixel grid. Enlarging an image cannot create the same real detail as an image captured at a higher resolution. Compression and format conversion can also alter file size, transparency or visible quality depending on the output format.

Privacy

This calculator works entirely from the dimensions you enter.

Important limitation

Browser support for image formats varies. Always inspect the exported file before using it in production, print, advertising or another important workflow.