创意
Aspect Ratio Calculator
Calculate and scale image/video dimensions while maintaining aspect ratio
常见问题
What is aspect ratio?
Aspect ratio is the proportional relationship between width and height of an image or screen, expressed as width:height (e.g., 16:9).
What is the standard widescreen ratio?
16:9 is the standard widescreen aspect ratio used for HD televisions, YouTube videos, and most modern displays.
How to Use the Aspect Ratio Calculator
Resize images and video while keeping the same proportions.
- Enter the original width and height.
- Enter the new width (or height).
- The calculator solves for the missing dimension and shows the ratio.
Aspect Ratio Formula
New Dimension
New Height = New Width × (Original Height / Original Width)
Scale one side and keep the original proportion.
Example:
Input: 1920×1080 resized to 1280 wide
Calculation: 1280 × (1080/1920)
Result: 720 (so 1280×720)
Real-World Use Cases
Video Export
Keep 16:9 when resizing footage.
Responsive Images
Generate proportional thumbnail sizes.
Tips
Tips
- Common ratios: 16:9 (video), 4:3 (legacy), 1:1 (social).
- Scaling proportionally prevents stretching or squishing.