Aspect Ratio Calculator help

Aspect Ratio Calculator handles the common ratio questions. Give it two values out of width, height, and ratio, and it finds the third.

Steps

  1. Enter any two of width, height, and ratio.
  2. Read the missing value and the simplified ratio.
  3. Use the fit box to size a video or image inside a container.

Common questions

How is the ratio simplified?

By dividing width and height by their greatest common divisor, so 1920 by 1080 becomes 16:9.

What ratios does it know?

Square, 4:3, 3:2, 16:10, 16:9, the two cinema ratios, 9:16 for vertical video, and 21:9 ultrawide.

What does fit do?

It gives the largest size with your ratio that still fits inside the width and height you set.

Does anything leave my browser?

No. The tool runs entirely on this page.

Everything runs in your browser. Nothing you enter or drop is uploaded.

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