How to Calculate and Convert Aspect Ratios Online
Aspect ratios define the proportional relationship between width and height in images, videos, and screens. Whether you are resizing images for social media, converting video formats, or designing responsive layouts, maintaining correct aspect ratios prevents stretching and distortion. This guide shows you how to calculate aspect ratios online using fixie.tools.
Step 1: Open the Aspect Ratio Calculator
Go to fixie.tools/aspect-ratio. No signup needed.
Step 2: Enter Your Dimensions
Enter the width and height of your image or video. The tool automatically calculates and simplifies the aspect ratio (e.g., 1920x1080 = 16:9).
Step 3: Calculate New Dimensions
Enter a new width or height and the tool calculates the other dimension to maintain the same aspect ratio. Useful for resizing images or creating responsive designs.
Step 4: Use Common Presets
Choose from common presets: 16:9 (HD/4K video), 4:3 (traditional), 1:1 (square/Instagram), 9:16 (vertical/Stories), 21:9 (ultrawide). Click a preset to instantly set dimensions.