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Aspect Ratio Calculator
Enter any width and height to reduce it to its simplest ratio, compare it against common social ratios, and get exact pixel sizes for 16:9, 9:16, 1:1, 4:5 and more.
How to use this tool
- Enter your image dimensions above.
- Results update instantly in your browser – nothing is uploaded, no signup needed.
- Copy or download the result, then continue with the next step of your workflow.
FAQs
What aspect ratio should I use for TikTok?
9:16 vertical – typically 1080×1920. Use the calculator’s target dropdown to convert any existing size.
How do I keep quality when changing ratios?
Crop rather than stretch. Enter your current size, pick the target ratio, and the tool tells you the exact matching width or height so your editor can crop precisely.
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