Calculate proportional dimensions and aspect ratio scaling factors instantly.
How to Use Aspect Ratio Calculator
Enter your original width and height (or pick a common aspect ratio preset like 16:9).
Enter a new target width or height - the other dimension is calculated automatically to preserve the exact ratio.
Copy the calculated dimension for your design or code.
Key Features & Practical Use Cases
Scaling UI image layouts to maintain perfect 16:9 or 4:3 proportions without distorting graphics.
Calculating the exact pixel height required for a specific width in responsive web development.
Determining the native aspect ratio of standard video or screen resolutions.
Frequently Asked Questions
Does it work with common video/screen ratios like 16:9 and 4:3?
Yes - common presets are available, or you can enter any custom width/height pair to derive its exact ratio.
Can I scale up an image and know the new height in advance, before resizing?
Yes - enter your original dimensions and target width, and it calculates the exact proportional height you'd need to maintain the same aspect ratio.
Does it simplify the ratio, like showing "16:9" instead of "1920:1080"?
Yes, alongside your exact pixel dimensions it typically shows the simplified ratio form for reference.
About OneClickly
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