Screen Size Calculator

About the Screen Size Calculator

The Screen Size Calculator on ToolHaven is a free, browser-based tool that helps you calculate a screen's actual width and height from its diagonal size and aspect ratio. Optionally add resolution to get pixel density (PPI). Compare two screen sizes to see which has more area. It runs entirely in your browser, so no data is sent to any server, and no account or signup is required. Whether you are a student, professional, or just someone looking for a quick answer, this tool gives you accurate results in seconds.

How to use the Screen Size Calculator

Using this tool is straightforward. Enter the diagonal screen size in inches (the number TV brands advertise). Pick the aspect ratio - 16:9 is the standard for most TVs, monitors, and phones. Add the screen resolution (optional) to calculate pixels per inch (PPI). Enter a second size to compare how much bigger it is in actual area.

Results are updated instantly as you enter values, so there is no need to click a submit button. You can adjust inputs freely and compare different scenarios in real time.

Why use ToolHaven?

ToolHaven offers 178+ free online calculators and tools across categories including Finance, Health, Math, Education, and more. All tools are free to use, require no installation, and work on any device. Your inputs never leave your browser, so your data stays private. The Screen Size Calculator is part of our Everyday collection. Explore related tools in the sidebar to get more done in one place.