Aspect Ratio Calculator

Find the ratio of any size, resize while keeping proportions, and calculate screen PPI • 100% free • No upload to server

1. Original size

Width

Height

Any unit works: pixels, inches, cm. Only the proportion matters.

2. Resize to a new size

Target aspect ratio

New width

New height

Rounding

Type a new width to get the height, or a new height to get the width.

To-scale preview of the target ratio

Common sizes for this target ratio

Width	Height

Screen PPI & Size Calculator

Enter a screen's resolution and diagonal to find its pixel density and real-world dimensions.

Resolution

Width (pixels)

Height (pixels)

Screen diagonal

Diagonal size

Unit

For example, a 15.6 inch laptop or a 6.1 inch phone.

Thanks for reading! If this article helped you, share it with someone who needs it.

Free Online Aspect Ratio Calculator – Resize Dimensions, Find Ratio & Screen PPI