Aspect Ratio Calculator

Simplify a width and height to a ratio, and resize without distortion.

Enter values

Width

Height

New width

—

ratio = w : h (reduced); new height = new width × h / w

All calculations run locally in your browser and update instantly as you type.

How do I resize without stretching?+

Keep the ratio: new height = new width × (original height ÷ original width). Enter your target width and the tool fills in the matching height.

All calculations run locally in your browser. Nothing you type is sent to a server.