Image Aspect Ratio Calculator
Calculate an image aspect ratio from width and height. Simplify the ratio and find a matching height for a new width, with no image file needed.
Loading your local workspace…
Your files are processed locally. The original file is kept unchanged. Choose your settings, create the result, and use the download button to save it.
About Image Aspect Ratio Calculator
Work out proportions before resizing a design or image. Enter the original width and height to get a simplified ratio, then enter a new width to calculate a proportional height. The calculator works with numbers and does not change a file.
How to use this tool
01 · Prepare your input
No file is required. Start with the width and height of the original image or design.
02 · Enter the original proportions
Type the original width and height, then enter the new width you want to use.
03 · Read the calculation
Calculate the simplified aspect ratio and matching height. No image export is needed.
Before you download.
What to know about Image Aspect Ratio Calculator.
Do I need to choose an image file?
No. This calculator works directly with width and height numbers. Use the Image Resizer when you want to change an actual image file.
Why is the calculated height rounded?
Images need whole-pixel dimensions. A proportional calculation may produce a fraction, so the displayed height is rounded to the nearest pixel.