Design & Multimedia
Aspect Ratio Calculator
Calculate and convert aspect ratios
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Frequently asked questions
What does the Aspect Ratio Calculator do?
It helps you calculate and convert aspect ratios.
What inputs do I need?
Enter Original width, Original height, Target width (optional), and Target height (optional).
Are decimals supported?
Yes, you can use decimal values where appropriate.
Related tools
About this tool
Inputs
- Original width
- Original height
- Target width (optional)
- Target height (optional)
Results
- Aspect ratio
- Calculated width
- Calculated height
Figuring out calculate and convert aspect ratios no longer requires manual arithmetic. The Aspect Ratio Calculator walks you through the math step by step. All you need to supply is original width, original height, target width (optional) and target height (optional). From there, the tool determines aspect ratio, calculated width and calculated height. Consistent sizing, spacing, and color values give a design cohesion that viewers feel even if they cannot articulate it.
Having a dedicated tool to calculate and convert aspect ratios saves time you would otherwise spend searching for formulas or setting up a spreadsheet. Use a modular scale (e.g., 1.25× or 1.333×) for harmonious font size progression. Run the calculation with your best-case and worst-case assumptions to bracket the likely outcome. Contrast ratio = (L1 + 0.05) / (L2 + 0.05) where L1 and L2 are relative luminances of the lighter and darker colors. Responsive design requires translating between physical units (inches, pt) and digital units (px, em, rem).