Castr blog

Aspect Ratio articles

Aspect ratios explained, and how to prepare video for every screen and platform it lands on.

2 posts

Aspect Ratio

Calculate aspect ratio with Width divided by Height, then simplify using the Greatest Common Divisor to express it as a clean ratio like 16:9.

Apr 1, 2026 · 9 min

Aspect Ratio

A vertical video aspect ratio is the ratio of a video's width to its height, where the height is greater than the width. The standard is 9:16.

Apr 1, 2026 · 17 min

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