Aspect Ratio Calculator
Find a simplified aspect ratio and calculate proportional dimensions for image and video exports.
Results are rounded to whole pixels. Some video encoders require even dimensions; adjust to your encoder requirements.
1280 × 720 px
How to use this tool
- Enter the source width and height.
- Choose a target width or height.
- Copy the proportional dimensions. Encoder-specific requirements may need further adjustment.
Frequently asked questions
Are my selected files uploaded?
The six local tools do not upload selected files. Processing takes place in your browser without saved file history. AI text tools have separate notices: their input is sent to DeepSeek for generation.
Do I need an account or credits?
The six local tools require no account. The five AI text tools require sign-in and use daily free allowances without consuming account credits. Linked AI image and video tools have their own policies.
What are the limits?
Input dimensions must be whole numbers from 1 to 100000. Results are rounded to whole pixels and are not guaranteed to meet every video encoder’s dimension requirements.
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