About Pixel Handbook

Pixel Handbook is an independent website with free calculators for pixel sizes and aspect ratios. It is made and run under the site name Pixel Handbook.

What is here

Aspect Ratio Calculator: find the ratio of any width and height, resize to a new width or height, see the nearest standard ratio and how a picture fits on another screen.

Pixels to Inches Converter: convert pixels to inches and inches to pixels at any PPI or DPI, for one value or a width and height, with centimeters, millimeters and the diagonal.

PPI Calculator: pixels per inch, dot pitch, pixels per centimeter, aspect ratio and viewing distance of a screen from its resolution and diagonal size, with a second screen for comparison.

DPI Calculator: the DPI of an image at a print size, the print size at a DPI, or the pixels a print needs, with paper and photo presets and an image you can drop in to read its size.

Screen Size Calculator: the diagonal, width, height and area of a screen from any one of them and its aspect ratio, with seating distances and a second screen for comparison.

More calculators for pixel sizes, screens, images and video are planned and will be listed here as they are added.

How the tools work

The calculators run in your browser. There is no sign-up, and the numbers you type are not sent to a server.