Image Aspect Ratio Calculator

See the current ratio, then crop to 16:9, 4:3, 1:1, 9:16, and more.

How to use Image Aspect Ratio Calculator

Upload a photo to see its current ratio.
Pick a target such as 16:9 or 1:1.
Crop to that ratio (center cover).
Download.

What this tool accepts

Shows current W:H
Common targets
Center crop
Keeps resolution of the crop

Formats: JPG, PNG, WebP

YouTube wants 16:9, Instagram feed wants 1:1, stories want 9:16. An aspect-ratio calculator that also crops saves a round trip through a generic resizer.

How the crop is chosen

The tool keeps as much of the photo as possible and trims the overflow (cover). Subject on the edge may be cut. Re-frame on the Crop page if you need an off-center box.

Calculator vs resizer

This does not force 1920×1080. It changes shape. Use Image Resizer afterwards if a platform also demands exact pixels.

Frequently asked questions

Does it only calculate, or also crop?

Both. Dimensions and simplified ratio show after upload. Processing crops to the selected target.