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Aspect Ratio Calculator

Calculate, scale, and visualize aspect ratios for images and video.

Calculate Ratio from Dimensions

Width (px)

×

Height (px)

Scale to New Size (keep ratio)

Ratio W

:

Ratio H

→

New Width

New Height

Fill either New Width or New Height — the other will be calculated.

Visual Preview

16:9

Common Ratios

How to Use the Aspect Ratio Calculator

Enter a width and height and click Calculate to see the simplified ratio and decimal.
In the Scale section, enter a ratio and either width or height to find the missing dimension.
Click any Common Ratio card to load it into the scale tool and preview it instantly.
The visual preview box shows the proportions of the current ratio graphically.