Screen & ruler

Screen Measurement Tools

Measure an object on your display, calculate screen density, or turn a diagonal size into usable width. These tools are designed for quick checks on phones, monitors, and TVs.

Choose a calculator

Open a tool, enter your measurements, and get an answer without an account.

Actual Size Online RulerCalibrate your screen and use a real-size ruler in inches, centimeters, and millimeters.Screen PPI CalculatorCalculate screen pixel density from resolution and diagonal size.Screen Size CalculatorFind screen width from diagonal size and aspect ratio.

Built for quick planning

MeasureSpark tools run in your browser and keep the calculation close to the task. Results are planning estimates, so confirm product coverage, installation requirements, and safety-critical dimensions before purchasing or building.