Question 1

How do I calculate aspect ratio from dimensions?

Accepted Answer

Select 'Dimensions to Ratio' mode, enter the width and height of your image or screen. The calculator automatically calculates and simplifies the aspect ratio to lowest terms. For example, 1920×1080 becomes 16:9.

Question 2

How do I calculate dimensions from aspect ratio?

Accepted Answer

Select 'Ratio to Dimensions' mode, enter the aspect ratio (width and height values), then enter either the desired width OR height. The calculator automatically calculates the other dimension to maintain the aspect ratio.

Question 3

What are common aspect ratios?

Accepted Answer

Common aspect ratios include: 16:9 (widescreen, HD video), 4:3 (standard, old TVs), 21:9 (ultrawide monitors), 1:1 (square, Instagram), 3:2 (photography), and 9:16 (vertical video, mobile). The calculator includes quick presets for these common ratios.

Question 4

How do I maintain aspect ratio when resizing?

Accepted Answer

Use 'Ratio to Dimensions' mode. Enter your current aspect ratio, then enter the new width (or height) you want. The calculator shows the corresponding height (or width) needed to maintain the same aspect ratio, preventing distortion.

Question 5

What's the difference between aspect ratio and resolution?

Accepted Answer

Aspect ratio is the proportional relationship (e.g., 16:9), while resolution is the actual pixel dimensions (e.g., 1920×1080). Multiple resolutions can share the same aspect ratio. For example, 1920×1080, 1280×720, and 3840×2160 all have a 16:9 aspect ratio.

Aspect Ratio Calculator - Image Dimensions

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