What is an aspect ratio?

It's the proportional relationship between width and height, written w:h. 1920×1080 reduces to 16:9, the standard widescreen ratio.

How do I resize without distortion?

Keep the same ratio: new height = target width × original height ÷ original width. The 'scaled height' output does this for you.

Aspect Ratio Calculator

Free aspect ratio calculator. Enter a width and height to get the simplest ratio (like 16:9), the decimal ratio, and the proportional height for a target width when resizing.

Find the simplest aspect ratio and scale dimensions proportionally.

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