Aspect ratio calculator for every frame.

Choose a preset, enter a width, and calculate the corresponding whole-pixel height.

Frame dimensions

Target ratio

Known width

px

Width to reduce

Height to reduce

Result

Ratio result

text
Scaled size: 1920 × 1080
Preset ratio: 16:9
Reduced input: 1920 × 1080
Simplest ratio: 16:9

Processed locally — inputs and results stay in this browser tab. Copy and download actions run only when you choose them.

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How RatioGrid processes dimensions locally.

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Common presets

16:9 is common for video, 4:3 for older displays and some presentations, 1:1 for squares, and 9:16 for vertical video. The content requirement should choose the format.

RatioGrid

Scale dimensions and reduce ratios without losing proportion.

Tools

Home Aspect ratio calculator for every frame.Ratio reducer for any dimensions.

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