Aspect Ratio Calculator for Images and Video
Enter a width and height and instantly see the aspect ratio. Lock the ratio and calculate new dimensions that preserve it when you resize.
Saves time when preparing images for social media, designing responsive layouts, or scaling video. No more guessing — just type one dimension and the tool calculates the other to keep everything proportional.
Dimensions
Common Presets
Resize Calculator
Given the current aspect ratio (16:9), if I want a specific width, what height do I need?
Result: 1280 x 720px (921,600 pixels)
Visual Preview
Quick Reference
Frequently Asked Questions — Aspect Ratio Calculator
Enter the width and height. The calculator simplifies it — 1920x1080 becomes 16:9.
Yes. Lock a ratio and change one dimension. The other updates automatically to maintain the proportion.
16:9 for video, 4:3 for older screens, 1:1 for social media squares, 9:16 for mobile stories and reels.
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