Category · 6 tools
Screen Info
What your screen is, in numbers. A browser can read some of them and cannot measure the rest, and these tools are clear about which is which.
Measure your screen
These need one number from you — or, for the ruler, a card you already have in your pocket.
- PPI / DPI CalculatorPixel density from your resolution and the screen diagonal you type.FindsPixel density · dot pitch
- Screen Size CalculatorThe other direction: a diagonal and a ratio give the width and height, in cm and inches.FindsPhysical width and height from a diagonal
- On-Screen RulerA ruler in centimeters or inches, calibrated against a bank card or your screen diagonal.FindsReal-size measuring, after calibration
Work out a ratio
Arithmetic only. No device needed, and nothing typed is kept.
What your browser reveals
The answers your browser gives to any site you visit, shown plainly and sent nowhere.
Guides for these tools
What a result means, and what to do next.