Scale every frame with confidence.

Lock a familiar ratio while scaling or reduce any dimensions to their simplest whole-number relationship.

Frame dimensions

Target ratio

Known width

px

Width to reduce

Height to reduce

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.

Calculate an aspect ratio from width and height and scale a preset without distortion.

Open

Reduce width and height to the simplest whole-number ratio.

Open

Learn how to calculate, simplify, and scale ratios with common frame examples.

Open

How RatioGrid processes dimensions locally.

Open

Keeping width ÷ height constant preserves the shape. Rounded pixel results can introduce a very small difference at unusual sizes.

RatioGrid

Scale dimensions and reduce ratios without losing proportion.

Tools

Information