Universal tools

📐 Aspect Ratio Calculator

Resize without distortion — any platform.

Proportional height

1080 × 1920

Reels / TikTok / Stories — 1080×1920

What is the aspect ratio calculator?

Aspect ratio is the proportional relationship between width and height (e.g. 9:16 for Stories/Reels, 1:1 for feed squares, 16:9 for YouTube). Keeping the ratio fixed lets you resize media without stretching it.

How to use it

  1. 1Choose or enter a target aspect ratio.
  2. 2Enter a known width or height.
  3. 3Read the matching dimension and common platform presets.

FAQ

What aspect ratio is best for Reels and TikTok?

9:16 (vertical full-screen), commonly 1080×1920 pixels.

What ratio should a YouTube thumbnail be?

16:9, ideally 1280×720 pixels.

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Aspect Ratio Calculator — Free Tool | HowToBuyFollowers