Free Design Calculators
Aspect Ratio Calculator
Choose a screen, social, ratio, or print standard—or enter custom dimensions—then resize without distortion.
What this tool does
Keep the dimensions proportional.
Start from a common screen, video, social, ratio, photo, or print standard—or enter custom dimensions. The calculator reduces the selected width and height to its simplest ratio, such as 1920 × 1080 becoming 16:9.
It also calculates a matching width or height for a new size, so an image, layout, or video can be resized without stretching or changing its composition.
Use the tool
Calculate and resize your dimensions
The ratio and proportional output update as you type. Nothing is uploaded or saved.
Result
Proportional dimensions
- Ratio
- 16:9
- Orientation
- Landscape
Common format: 16:9 Widescreen
Scaled size
1,280 × 720px
How to use it
Three quick steps
- 1Choose a preset standard or enter the original width and height in pixels.
- 2Choose whether you want to set a new width or a new height.
- 3Enter the new dimension, then copy the proportional size from the result.
Worked example
Resize a 1920 × 1080 video
A 1920 × 1080 frame simplifies to 16:9. Set the new width to 1280 and the calculator preserves that ratio.
FAQ
Questions about the aspect ratio calculator
Practical details about ratios, rounding, and using the result.
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