Free Aspect Ratio Calculator
Calculate and convert aspect ratios for images, videos, and screens. Find dimensions for any target ratio.
Part of Yoopla's 445+ free browser tools.
Aspect Ratio
Enter either width or height and click outside to calculate the other
How to Use Aspect Ratio Calculator
- 1
Enter width and height values.
- 2
The tool calculates the simplified ratio automatically.
- 3
Use scaling to find new dimensions for any target size.
- 4
Choose from common presets like 16:9, 4:3, or 1:1.
Frequently Asked Questions
What is an aspect ratio?▾
An aspect ratio is the proportional relationship between the width and height of an image or screen, expressed as W:H.
What are common ratios?▾
16:9 (widescreen), 4:3 (standard), 1:1 (square), 21:9 (ultrawide), and 9:16 (portrait).
Can I scale dimensions?▾
Yes — enter a target width or height and the tool calculates the other dimension while maintaining the ratio.
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