Category: Calculators
Aspect Ratio Calculator
Simplify ratios and resize width or height proportionally
Enter width and height to simplify an aspect ratio and calculate matching dimensions for resizing. Everything runs in your browser.
Everything on this page is processed in your browser. Nothing is uploaded.
What this tool does
Use this calculator when resizing images, videos, thumbnails and design frames. It keeps the original proportion and gives matching width or height values locally.
How to use it
- Enter the original width and height.
- Enter a new width or new height target.
- Use the simplified ratio and matching dimensions.
Privacy
This tool runs entirely in your browser. Your input is never uploaded, stored or shared — closing the tab removes it.
Frequently asked questions
- Is any image uploaded?
- No. This calculator only uses the numbers you type and runs in your browser.
- What does the ratio mean?
- The ratio is the simplest whole-number relationship between width and height, such as 16:9.
- Can I use decimal sizes?
- Yes. The resize calculation accepts decimal inputs and rounds output cleanly.