Aspect Ratio Calculator

The Aspect Ratio Calculator helps you work with image and video dimensions without distortion. Enter any width and height to instantly find its simplified aspect ratio (e.g. 1920×1080 → 16:9) and decimal equivalent. The dimension scaler lets you maintain a ratio when resizing. Enter the original dimensions and a new width or height—the calculator will compute the missing dimension so your content stays proportional. Enter both dimensions to see the closest match for each. A set of common aspect ratio presets (16:9, 4:3, 1:1, 21:9, 9:16, etc.) lets you quickly load standard sizes for social media, video, and print. Ideal for designers, video editors, and web developers.