Percentage calculator
Calculate percentages online, including percent of a number, percentage increase, and percentage decrease.
Aspect ratio calculator
Simplify aspect ratios and calculate matching image or video dimensions.
Works on your device. Your files are never uploaded.
Preparing this page for offline use…
How to use Aspect ratio calculator
Enter the original width and height to simplify the ratio. Set a new width or height to calculate the other dimension while keeping proportions. Calculated dimensions are rounded to whole pixels.
Files and calculations stay on your device. After this page and its assets have loaded, it works without an internet connection.
Aspect ratio calculator FAQs
Is Aspect ratio calculator free?
Aspect ratio calculator is a free online tool on ReallyUseful.Tools. No account is required.
Does Aspect ratio calculator run in my browser?
Aspect ratio calculator is designed to run in your browser where supported, so files can stay on your device instead of being uploaded to a server.
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